CN103207683B - Tobacco grade keyboard input method - Google Patents
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- CN103207683B CN103207683B CN201310135014.XA CN201310135014A CN103207683B CN 103207683 B CN103207683 B CN 103207683B CN 201310135014 A CN201310135014 A CN 201310135014A CN 103207683 B CN103207683 B CN 103207683B
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Abstract
The invention discloses a kind of tobacco grade keyboard input method, described keyboard comprises key-press matrix, single-chip microcomputer, display and communication interface, described key-press matrix is four lines seven column matrix, the button of described key-press matrix comprises direct definition push key and additional definitions button, described direct definition push key is made up of following button: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, in lower assorted, in micro-three, middle lemon, middle tangerine, complete ripeness, lower micro-two, lower lemon, lower tangerine, smooth, upper reddish brown, outside level, bluish yellow, described additional definitions button is by 1 key, 2 keys, 3 keys, 4 keys are totally four digital keys compositions.Only to be needed once by the present invention or secondary operation button can complete the input of tobacco leaf degree information, so can tobacco leaf degree information is input in computer system fast, efficiently and accurately, avoid causing economic loss because of input junk ratings or errorlevel.
Description
Technical field
The present invention relates to a kind of tobacco leaf degree input method, particularly relate to one accurately, simply, tobacco grade keyboard input method efficiently.
Background technology
According to " National Standard of the People's Republic of China " GB2635 ~ 92 " flue-cured tobacco ", flue-cured tobacco is divided into 42 grades, and the division of grade is defined as follows:
Grade ID | Grade is encoded | Grade name | Color | Position | Grade | Group |
1 | C1F | Middle tangerine one | F-is orange | In the middle part of C- | First-class cigarette | Just group |
2 | C2F | Middle tangerine two | F-is orange | In the middle part of C- | First-class cigarette | Just group |
3 | C3F | Middle tangerine three | F-is orange | In the middle part of C- | First-class cigarette | Just group |
4 | C1L | Middle lemon one | L-lemon yellow | In the middle part of C- | First-class cigarette | Just group |
5 | C2L | Middle lemon two | L-lemon yellow | In the middle part of C- | First-class cigarette | Just group |
6 | B1F | Upper tangerine one | F-is orange | B-top | First-class cigarette | Just group |
7 | B2F | Upper tangerine two | F-is orange | B-top | First-class cigarette | Just group |
8 | B1L | Upper lemon one | L-lemon yellow | B-top | First-class cigarette | Just group |
9 | B1R | Upper red one | R-is reddish brown | B-top | First-class cigarette | Just group |
10 | H1F | Complete ripeness one | Do not specify | H-complete ripeness leaf | First-class cigarette | Just group |
11 | X1F | Lower tangerine one | F-is orange | X-bottom | First-class cigarette | Just group |
12 | C3L | Middle lemon three | L-lemon yellow | In the middle part of C- | Medium grade cigarette | Just group |
13 | C4F | Middle tangerine four | F-is orange | In the middle part of C- | Medium grade cigarette | Just group |
14 | C4L | Middle lemon four | L-lemon yellow | In the middle part of C- | Medium grade cigarette | Just group |
15 | X2F | Lower tangerine two | F-is orange | X-bottom | Medium grade cigarette | Just group |
16 | X3F | Lower tangerine three | F-is orange | X-bottom | Medium grade cigarette | Just group |
17 | X1L | Lower lemon one | L-lemon yellow | X-bottom | Medium grade cigarette | Just group |
18 | X2L | Lower lemon two | L-lemon yellow | X-bottom | Medium grade cigarette | Just group |
19 | B3F | Upper tangerine three | F-is orange | B-top | Medium grade cigarette | Just group |
20 | B4F | Upper tangerine four | F-is orange | B-top | Medium grade cigarette | Just group |
21 | B2L | Upper lemon two | L-lemon yellow | B-top | Medium grade cigarette | Just group |
22 | B3L | Upper lemon three | L-lemon yellow | B-top | Medium grade cigarette | Just group |
23 | B2R | Upper reddish brown two | R-is reddish brown | B-top | Medium grade cigarette | Just group |
24 | B3R | Upper reddish brown three | R-is reddish brown | B-top | Medium grade cigarette | Just group |
25 | H2F | Complete ripeness two | Do not specify | H-complete ripeness leaf | Medium grade cigarette | Just group |
26 | X2V | Lower micro-blue or green two | The micro-band of V-is yellow | X-bottom | Medium grade cigarette | Micro-band leafiness group |
27 | C3V | In micro-blue or green three | The micro-band of V-is yellow | In the middle part of C- | Medium grade cigarette | Micro-band leafiness group |
28 | B2V | Upper micro-blue or green two | The micro-band of V-is yellow | B-top | Medium grade cigarette | Micro-band leafiness group |
29 | B3V | Upper micro-blue or green three | The micro-band of V-is yellow | B-top | Medium grade cigarette | Micro-band leafiness group |
30 | S1 | Smooth one | Do not specify | The smooth leaf of S- | Medium grade cigarette | Smooth |
31 | B4L | Upper lemon four | L-lemon yellow | B-top | Inferior cigarette | Just group |
32 | X3L | Lower lemon three | L-lemon yellow | X-bottom | Inferior cigarette | Just group |
33 | X4L | Lower lemon four | L-lemon yellow | X-bottom | Inferior cigarette | Just group |
34 | X4F | Lower tangerine four | F-is orange | X-bottom | Inferior cigarette | Just group |
35 | S2 | Smooth two | Do not specify | The smooth leaf of S- | Inferior cigarette | Smooth |
36 | CX1K | In lower assorted one | K-is variegated | CX-middle and lower part | Inferior cigarette | Variegated leaf group |
37 | CX2K | In lower assorted two | K-is variegated | CX-middle and lower part | Inferior cigarette | Variegated leaf group |
38 | B1K | Upper assorted one | K-is variegated | B-top | Inferior cigarette | Variegated leaf group |
39 | B2K | Upper assorted two | K-is variegated | B-top | Inferior cigarette | Variegated leaf group |
40 | B3K | Upper assorted three | K-is variegated | B-top | Inferior cigarette | Variegated leaf group |
41 | GY1 | Bluish yellow one | GY-bluish yellow look | Other | Inferior cigarette | Bluish yellow group |
42 | GY2 | Bluish yellow two | GY-bluish yellow look | Other | Inferior cigarette | Bluish yellow group |
In tobacco purchasing and logistics link thereof, need manually to carry out grade confirmation to cured tobacco leaf quality, because between tobacco leaf each adjacent rank, otherness is less, price is sold in the purchase that the grade of tobacco leaf directly has influence on again tobacco leaf, makes tobacco leaf degree confirmation work become a very rigorous job.And in recent years, the large area of information system uses, the system of various platform all needs to be inputted tobacco leaf degree by human-computer interaction interface, makes computer system carry out identification record accurately to tobacco leaf.
In common human-computer interaction interface, the input validation of grade is completed by two kinds of modes usually:
The first: having letter with the man-machine interface of numerical key or computer general-purpose input keyboard, by In Grade monogram carry out object such as In Grade " middle tangerine two " grade that step-by-step input reaches input rank carry out input validation can input successively C, 2, F tri-letters reach the target of input;
The second: in the graphical man-machine interface accessed there being Genius mouse, selected by Genius mouse the human-computer interaction interfaces such as drop-down choice box to carry out selection and the input validation of grade, also select grade by the switch key up and down of Genius mouse roller or input through keyboard key in addition.
Except above two kinds of input methods, now have no other comparatively ripe and extensive tobacco leaf degree input conformation method used.
In above-mentioned two kinds of conventional input method, there are following problems:
In first method, the character input keyboard In Grade that grade provides by computing machine inputs, the input of tobacco leaf degree is completed by the input of 2-4 character and grade confirms according to the difference of grade number of characters, but due to the randomness of input character combination, the bit error rate of input will be very high, in actual use, if the coding of user's In Grade is unfamiliar with, probably cause input junk ratings or grade input error, cause and directly economic loss is caused to tobacco leaf degree determination deviation.
In second method, because selectable grade is all by the fixing display of system, there is not the problem of input error code, but because 42 grade quantity are more, spend more time browser interface to search corresponding grade when selecting a certain grade, and grade coding permutations is comparatively close again, may when long-time repetitive operation be chosen, because the reasons such as visual fatigue cause selection mistake, cause serious consequence.
And in actual tobacco leaf degree confirmation work, the personnel of participation work are agricultural population mostly, understand less to informationization technology, be difficult to require that it can keep higher accuracy to the man-machine interactive operation of complexity, and the contradiction that this also exactly in agricultural production Process of Information is main.
Summary of the invention
Object of the present invention be just to provide to solve the problem one accurately, simply, tobacco grade keyboard input method efficiently.
In order to achieve the above object, present invention employs following technical scheme:
Tobacco grade keyboard input method of the present invention, described keyboard comprises key-press matrix, single-chip microcomputer, display and communication interface, described key-press matrix is four lines seven column matrix, its button comprises direct definition push key and additional definitions button, described direct definition push key is made up of following button: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, in lower assorted, in micro-three, middle lemon, middle tangerine, complete ripeness, lower micro-two, lower lemon, lower tangerine, smooth, upper reddish brown, level outer, bluish yellow, described additional definitions button by 1 key, 2 keys, 3 keys, 4 keys totally four digital keys form.
In application, the direct definition push key of independent employing inputs or direct definition push key and the input of additional definitions key combination can be completed the accurate input of all tobacco leaf degree information, compare employing at least twice, the conventional keyboard input method of maximum four times, its accuracy and simplicity are all significantly improved.
As preferably, described direct definition push key and additional definitions button arrange by the following method: the first row is from left to right: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, 1 key; Second row is from left to right: in lower assorted, in micro-three, middle lemon, middle tangerine, 2 keys; The third line is from left to right: complete ripeness, lower micro-two, lower lemon, lower tangerine, 3 keys; Fourth line is from left to right: smooth, upper reddish brown, level is outer, bluish yellow, 4 keys.Described button is labeled as the different colours being convenient to input operation respectively, upper assorted, in lower assorted, complete ripeness, be first group outside smooth, upper reddish brown, level, described micro-green grass or young crops, in micro-three, lower micro-two, bluish yellow be second group, described upper lemon, middle lemon, lower lemon are the 3rd group, described upper tangerine, middle tangerine, lower tangerine are the 4th group, the button of described first group, second group, the 3rd group and the 4th group adopts different color combination respectively, can complete input through keyboard more rapidly in vision and operating habit.
The button of described key-press matrix also comprises following operation push-button: delete key, function key, reset key, end key, deciding grade and level key, OK button, upward arrow key and Down Arrow.These operation push-buttons and direct definition push key and additional definitions button cooperatively interact the complete input of the information that realizes.
As preferably, described single-chip microcomputer to the disposal route of the key-press input of described key-press matrix is: first in internal memory, state following variable, for the treatment of input rank Logic judgment:
RA: for the instant input key assignments of storage keyboard;
RB: for the interim key assignments of storage keyboard input last time;
RC: for storing the combination key assignments after RA and RB connection;
Slist: for the corresponding enter key code table of storage level;
Llist: for storing the grade that success inputs;
Then, perform according to the following steps:
(1) data initialization;
(2) etc. to be entered;
(3) key of user's input is received stored in RA;
(4) check whether RA is operational order, if so, then responds this instruction, if not, then enter next step;
(5) stored in RC after being connected by RA and RB, RC is searched at Slist;
(6) judge whether to find RC, if found, then enter next step, if can not find, then enter step (10);
(7) by input information stored in Llist;
(8) input results is shown;
(9) this process terminates, and proceeds to step (2), waits for and inputting next time;
(10) judge whether RC length reaches 4, if reached, then show input error information, then proceed to step (2), wait for and inputting next time, if do not reached, then by RA stored in RB, then show input results, this process terminates, proceed to step (2), wait for and inputting next time.
Beneficial effect of the present invention is:
Only to be needed once by the present invention or secondary operation button can complete the input of tobacco leaf degree information, so can tobacco leaf degree information is input in computer system fast, efficiently and accurately, avoid causing economic loss because of input junk ratings or errorlevel.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of tobacco leaf degree keyboard of the present invention;
Fig. 2 is the structural representation of key-press matrix of the present invention;
Fig. 3 is the button operation logic process flow figure of tobacco leaf degree keyboard of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail:
As shown in Figure 1, tobacco leaf degree keyboard of the present invention comprises four lines seven row key-press matrix, single-chip microprocessor MCU, display lcd and comprises the communication interface of USB, RS232, RS485, Zigbee, and single-chip microprocessor MCU is connected with the inner of four lines seven row key-press matrix, display lcd and communication interface respectively.Wherein, single-chip microprocessor MCU adopts 30MHz low-power consumption chip microprocessor; Display lcd adopts 128x64 point gray scale LCD display; USB, RS232, RS485 are wire communication interface; Zigbee is wireless communicaltion module access.
As shown in Figure 2, the button of key-press matrix comprises direct definition push key, additional definitions button and operation push-button, wherein, described direct definition push key is made up of following button: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, in lower assorted, in micro-three, middle lemon, middle tangerine, complete ripeness, lower micro-two, lower lemon, lower tangerine, smooth, upper reddish brown, level outer, bluish yellow, described additional definitions button by 1 key, 2 keys, 3 keys, 4 keys totally four digital keys form; Operation push-button is made up of following button: delete key, function key, reset key, end key, deciding grade and level key, OK button, upward arrow key and Down Arrow.The button of described four lines seven row key-press matrix arranges by the following method: the first row is from left to right: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, 1 key, delete key, function key; Second row is from left to right: in lower assorted, in micro-three, middle lemon, middle tangerine, 2 keys, reset key, end key; The third line is from left to right: complete ripeness, lower micro-two, lower lemon, lower tangerine, 3 keys, upward arrow key, deciding grade and level key; Fourth line is from left to right: smooth, upper reddish brown, level is outer, bluish yellow, 4 keys, Down Arrow, OK button.In above-mentioned button, upper assorted, in lower assorted, complete ripeness, be first group outside smooth, upper reddish brown, level, described micro-green grass or young crops, in micro-three, lower micro-two, bluish yellow be second group, described upper lemon, middle lemon, lower lemon are the 3rd group, described upper tangerine, middle tangerine, lower tangerine are the 4th group, the button of described first group, second group, the 3rd group and the 4th group is labeled as the different colours being convenient to input operation respectively, such as: first group is grey, second group is light green color, 3rd group is light yellow, 4th group is buff, all represents by grey in various degree in figure.
Composition graphs 2, the corresponding key assignments table of in-line coding of above-mentioned each button is as follows:
Sequence number | Title | Coding | Row key assignments C | Line unit value R |
1 | Upper assorted | BK | 1 | 1 |
2 | In lower assorted | CXK | 1 | 2 |
3 | Complete ripeness | HF | 1 | 3 |
4 | Smooth | S | 1 | 4 |
5 | Upper micro-green grass or young crops | BV | 2 | 1 |
6 | In micro-three | C3V | 2 | 2 |
7 | Lower micro-two | X2V | 2 | 3 |
8 | Upper reddish brown | BR | 2 | 4 |
9 | Upper lemon | BL | 3 | 1 |
10 | Middle lemon | CL | 3 | 2 |
11 | Lower lemon | XL | 3 | 3 |
12 | Outside level | JW | 3 | 4 |
13 | Upper tangerine | BF | 4 | 1 |
14 | Middle tangerine | CF | 4 | 2 |
15 | Lower tangerine | XF | 4 | 3 |
16 | Bluish yellow | GY | 4 | 4 |
17 | 1 | 5 | 1 | |
18 | 2 | 5 | 2 | |
19 | 3 | 5 | 3 | |
20 | 4 | 5 | 4 | |
21 | Delete | 6 | 1 | |
22 | Reset | 6 | 2 | |
23 | ↑ | 6 | 3 | |
24 | ↓ | 6 | 4 | |
25 | Function | 7 | 1 | |
26 | Terminate | 7 | 2 | |
27 | Deciding grade and level | 7 | 3 | |
28 | Confirm | 7 | 4 |
Keyboard adopts one-touch input or twice combination button input for information input, according to relation corresponding in the coding rule of tobacco leaf degree and above key assignments table, tobacco leaf degree input rule can be worked out following combined key code table, for inputting the system responses of information, and search and error code shielding processing for key:
Sequence number | Title | Coding | First time key value (CR) | Second time key value (CR) |
1 | C1F | Middle tangerine one | 42 | 51 |
2 | C2F | Middle tangerine two | 42 | 52 |
3 | C3F | Middle tangerine three | 42 | 53 |
4 | C1L | Middle lemon one | 32 | 51 |
5 | C2L | Middle lemon two | 32 | 52 |
6 | B1F | Upper tangerine one | 41 | 51 |
7 | B2F | Upper tangerine two | 41 | 52 |
8 | B1L | Upper lemon one | 31 | 51 |
9 | B1R | Upper red one | 24 | 51 |
10 | H1F | Complete ripeness one | 13 | 51 |
11 | X1F | Lower tangerine one | 43 | 51 |
12 | C3L | Middle lemon three | 32 | 53 |
13 | C4F | Middle tangerine four | 42 | 54 |
14 | C4L | Middle lemon four | 32 | 54 |
15 | X2F | Lower tangerine two | 43 | 52 |
16 | X3F | Lower tangerine three | 43 | 53 |
17 | X1L | Lower lemon one | 33 | 51 |
18 | X2L | Lower lemon two | 33 | 52 |
19 | B3F | Upper tangerine three | 41 | 53 |
20 | B4F | Upper tangerine four | 41 | 54 |
21 | B2L | Upper lemon two | 31 | 52 |
22 | B3L | Upper lemon three | 31 | 53 |
23 | B2R | Upper reddish brown two | 24 | 52 |
24 | B3R | Upper reddish brown three | 24 | 53 |
25 | H2F | Complete ripeness two | 13 | 52 |
26 | X2V | Lower micro-blue or green two | 23 | - |
27 | C3V | In micro-blue or green three | 22 | - |
28 | B2V | Upper micro-blue or green two | 21 | 52 |
29 | B3V | Upper micro-blue or green three | 21 | 53 |
30 | S1 | Smooth one | 14 | 51 |
31 | B4L | Upper lemon four | 31 | 54 |
32 | X3L | Lower lemon three | 33 | 53 |
33 | X4L | Lower lemon four | 33 | 54 |
34 | X4F | Lower tangerine four | 43 | 54 |
35 | S2 | Smooth two | 14 | 52 |
36 | CX1K | In lower assorted one | 12 | 51 |
37 | CX2K | In lower assorted two | 12 | 51 |
38 | B1K | Upper assorted one | 11 | 51 |
39 | B2K | Upper assorted two | 11 | 52 |
40 | B3K | Upper assorted three | 11 | 53 |
41 | GY1 | Bluish yellow one | 44 | 51 |
42 | GY2 | Bluish yellow two | 44 | 52 |
43 | JW | Outside level | 34 | - |
As shown in Figure 3, system is combined into grade to process repeatedly input, and single-chip microcomputer to the disposal route of the key-press input of described key-press matrix is: first in internal memory, state following variable, for the treatment of input rank Logic judgment:
RA: for the instant input key assignments of storage keyboard;
RB: for the interim key assignments of storage keyboard input last time;
RC: for storing the combination key assignments after RA and RB connection;
Slist: for the corresponding enter key code table of storage level;
Llist: for storing the grade that success inputs;
Then, perform according to the following steps:
(1) data initialization;
(2) etc. to be entered;
(3) key of user's input is received stored in RA;
(4) check whether RA is operational order, if so, then responds this instruction, if not, then enter next step;
(5) stored in RC after being connected by RA and RB, RC is searched at Slist;
(6) judge whether to find RC, if found, then enter next step, if can not find, then enter step (10);
(7) by input information stored in Llist;
(8) input results is shown;
(9) this process terminates, and proceeds to step (2), waits for and inputting next time;
(10) judge whether RC length reaches 4, if reached, then show input error information, then proceed to step (2), wait for and inputting next time, if do not reached, then by RA stored in RB, then show input results, this process terminates, proceed to step (2), wait for and inputting next time.
To sum up, the present invention adopts separately direct definition push key to input namely once input or direct definition push key and the input of additional definitions key combination and secondary input can be completed the accurate input of all tobacco leaf degree information, compare employing at least twice, the conventional keyboard input method of maximum four times, its accuracy and simplicity are all significantly improved.
Claims (3)
1. a tobacco grade keyboard input method, described keyboard comprises key-press matrix, single-chip microcomputer, display and communication interface, described key-press matrix is four lines seven column matrix, it is characterized in that: the button of described key-press matrix comprises direct definition push key and additional definitions button, described direct definition push key is made up of following button: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, in lower assorted, in micro-three, middle lemon, middle tangerine, complete ripeness, lower micro-two, lower lemon, lower tangerine, smooth, upper reddish brown, outside level, bluish yellow, described additional definitions button is by 1 key, 2 keys, 3 keys, 4 keys are totally four digital keys compositions, the button of described key-press matrix also comprises following operation push-button: delete key, function key, reset key, end key, deciding grade and level key, OK button, upward arrow key and Down Arrow, described single-chip microcomputer to the disposal route of the key-press input of described key-press matrix is:
First in internal memory, following variable is stated, for the treatment of input rank Logic judgment:
RA: for the instant input key assignments of storage keyboard;
RB: for the interim key assignments of storage keyboard input last time;
RC: for storing the combination key assignments after RA and RB connection;
Slist: for the corresponding enter key code table of storage level;
Llist: for storing the grade that success inputs;
Then, perform according to the following steps:
(1) data initialization;
(2) etc. to be entered;
(3) key of user's input is received stored in RA;
(4) check whether RA is operational order, if so, then responds this instruction, if not, then enter next step;
(5) stored in RC after being connected by RA and RB, RC is searched at Slist;
(6) judge whether to find RC, if found, then enter next step, if can not find, then enter step (10);
(7) by input information stored in Llist;
(8) input results is shown;
(9) this process terminates, and proceeds to step (2), waits for and inputting next time;
(10) judge whether RC length reaches 4, if reached, then show input error information, then proceed to step (2), wait for and inputting next time, if do not reached, then by RA stored in RB, then show input results, this process terminates, proceed to step (2), wait for and inputting next time.
2. tobacco grade keyboard input method according to claim 1, is characterized in that: described direct definition push key and additional definitions button arrange by the following method: the first row is from left to right: upper assorted, upper micro-green grass or young crops, upper lemon, upper tangerine, 1 key; Second row is from left to right: in lower assorted, in micro-three, middle lemon, middle tangerine, 2 keys; The third line is from left to right: complete ripeness, lower micro-two, lower lemon, lower tangerine, 3 keys; Fourth line is from left to right: smooth, upper reddish brown, level is outer, bluish yellow, 4 keys.
3. tobacco grade keyboard input method according to claim 2, it is characterized in that: described assorted, in lower assorted, complete ripeness, be first group outside smooth, upper reddish brown, level, described micro-green grass or young crops, in micro-three, lower micro-two, bluish yellow be second group, described upper lemon, middle lemon, lower lemon are the 3rd group, described upper tangerine, middle tangerine, lower tangerine are the 4th group, and the button of described first group, second group, the 3rd group and the 4th group adopts different color combination respectively.
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87200305U (en) * | 1987-01-19 | 1988-07-20 | 广州电讯器材厂 | Popular calculator for applying nitrogenous fertilizer to rice field |
CN1403903A (en) * | 2002-10-14 | 2003-03-19 | 冯文生 | Single-hand operated keyboard and its input method |
CN1564117A (en) * | 2004-03-23 | 2005-01-12 | 禹业茂 | 4-D extended digital keyboard |
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2013
- 2013-04-18 CN CN201310135014.XA patent/CN103207683B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN87200305U (en) * | 1987-01-19 | 1988-07-20 | 广州电讯器材厂 | Popular calculator for applying nitrogenous fertilizer to rice field |
CN1403903A (en) * | 2002-10-14 | 2003-03-19 | 冯文生 | Single-hand operated keyboard and its input method |
CN1564117A (en) * | 2004-03-23 | 2005-01-12 | 禹业茂 | 4-D extended digital keyboard |
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