FR2559673A1 - SKI WITH AT LEAST ONE SIDE HAVING A STRONG CURVATURE IN ITS CENTRAL PART - Google Patents

SKI WITH AT LEAST ONE SIDE HAVING A STRONG CURVATURE IN ITS CENTRAL PART Download PDF

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Publication number
FR2559673A1
FR2559673A1 FR8502048A FR8502048A FR2559673A1 FR 2559673 A1 FR2559673 A1 FR 2559673A1 FR 8502048 A FR8502048 A FR 8502048A FR 8502048 A FR8502048 A FR 8502048A FR 2559673 A1 FR2559673 A1 FR 2559673A1
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Prior art keywords
ski
curvature
ratio
skis
central part
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FR8502048A
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French (fr)
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FR2559673B1 (en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/0405—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker
    • A63C5/0411—Shape thereof when projected on a plane, e.g. sidecut, camber, rocker asymmetric

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  • Road Paving Structures (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

The invention relates to a ski comprising, at least on one side, a marked inward curve in its central part or, alternatively, over its entire length, the values of the ratio between the inward curve (sag) F and the chord L of the inwardly curved part being between 1/100 and 1/10, preferably between 1/70 and 1/20, and being from 4 to 40 times as great as those of currently known skis.

Description

La présente invention concerne un ski dont au moins un côté comporte une forte courbure sur toute sa longueur ou dans une partie centrale de celle-ci, les valeurs du rapport entre la flèche et la corde de la partie incurvée sont supérieures de 4 à 40 fois à celles des skis connus à l'heure actuelle. The present invention relates to a ski of which at least one side has a strong curvature over its entire length or in a central part thereof, the values of the ratio between the arrow and the rope of the curved part are greater than 4 to 40 times to those of skis known at present.

On a trouvé de façon surprenante, pendant plusieurs essais effectués sur une série de skis ayant des dimensions et des formes différentes, qu'un profil fortement concave d'au moins un côté du ski permettait de franchir une courbe d'une manière extrêmement aisés sans soumettre le skieur aux efforts physiques nécessaires jusqu'à maintenant avec les skis classiques, en permettant ainsi de skier avec le minimum d'efforts et d'une manière bien plus aisée. It was surprisingly found, during several tests carried out on a series of skis having different dimensions and shapes, that a strongly concave profile of at least one side of the ski made it possible to cross a curve in an extremely easy manner without subjecting the skier to the physical efforts necessary until now with conventional skis, thus allowing skiing with the minimum of effort and in a much easier way.

Cet effet est essentiellement dû au fait que les courbes sont négociées non pas par un glissement latéral, comme cela se produit avec les skis classiques, mais au contraire grâce à l'influence de cette très forte courbure du côté du ski, cette courbure permettant de négocier des courbes ayant un rayon compris entre quelques mètres et plusieurs dizaines de mètres, la conformation du ski selon l'invention se traduisant par une plus grande efficacité à la fois pour le skieur amateur et le skieur de compétition. This effect is mainly due to the fact that the curves are negotiated not by lateral sliding, as occurs with conventional skis, but on the contrary thanks to the influence of this very strong curvature on the side of the ski, this curvature making it possible to negotiating curves having a radius of between a few meters and several tens of meters, the conformation of the ski according to the invention resulting in greater efficiency for both the amateur skier and the competitive skier.

L'objet de la présente invention est de créer un ski du type défini ci-dessus, ayant des caractéris- tiques géométriques bien définies, et plus exactement ayant une courbure latérale présentant un rapport particulier entre la corde et la flèche de la partie incurvée latéralement du ski. The object of the present invention is to create a ski of the type defined above, having well-defined geometric characteristics, and more precisely having a lateral curvature having a particular relationship between the rope and the arrow of the curved part laterally. ski.

On a trouvé qu'un tel rapport devait être compris entre 1/100 et 1/10, en particulier entre 1/70 et 1/20, pour atteindre les performances optimales avec le ski, en relation à la fois avec les aptitudes personnelles du skieur et les conditions de la neige. We have found that such a ratio should be between 1/100 and 1/10, in particular between 1/70 and 1/20, to achieve optimal performance with skiing, in relation to both the personal skills of the skier and snow conditions.

Les skis conformes à la présente invention ont été initialement conçus pour de la neige fraîche, sur laquelle ils permettent de skier sans aucune difficulté, puisqu'une augmentation de la surface existant sur les parties avant et arrIère du ski fait en sorte qu'un skieur skie en étant placé comparativement dans une position plus haute qu'avec un ski classique. En outre, pour négocier une courbe, il n'est plus nécessaire d'exécuter des sauts avec une rotation des skis mais il est seulement suffisant de plier latéralement les genoux à un degré plus ou moins fort pour négocier parfaitement des courbes précises. The skis according to the present invention were initially designed for fresh snow, on which they allow skiing without any difficulty, since an increase in the surface existing on the front and rear parts of the ski means that a skier ski by being placed comparatively in a higher position than with a conventional ski. In addition, to negotiate a curve, it is no longer necessary to perform jumps with a rotation of the skis but it is only sufficient to bend the knees laterally to a greater or lesser degree to negotiate precise curves perfectly.

I1 est évident que les skis conformes à la présente invention, en particulier ceux dont le rapport précité est proche de 1/10, ont une conformation géométrique présentant une courbure remarquable et il en résulte que les parties avant et arrière du ski ont de très grandes surfaces par comparaison aux skis classiques, tandis que la partie intermédiaire du ski a une largeur identique ou réduite. It is obvious that the skis according to the present invention, in particular those whose aforementioned ratio is close to 1/10, have a geometrical conformation having a remarkable curvature and it follows that the front and rear parts of the ski have very large surfaces compared to conventional skis, while the intermediate part of the ski has an identical or reduced width.

Le rayon de la courbe négociée par un skieur est défini pour des profils particuliers, en supposant que la courbure du ski est une courbure circulaire, par la formule
R = L2/8F, où L désigne la corde la partie incurvée et F la flèche de cette partie incurvée.The radius of the curve negotiated by a skier is defined for particular profiles, assuming that the curvature of the ski is a circular curvature, by the formula
R = L2 / 8F, where L designates the cord the curved part and F the arrow of this curved part.

En supposant par exemple que L = 1,80 m et
F/L = 1/80, les courbes pouvant etre franchies ont le rayon suivant
R = (1,80 x 80 ) : 8 = 18 m.Assuming for example that L = 1.80 m and
F / L = 1/80, the curves that can be crossed have the following radius
R = (1.80 x 80): 8 = 18 m.

En supposant maintenant que L = 1,80 m et
F/L = 1/20, les courbes pouvant être franchies ont le rayon suivant
R = (1,80 x 20) : 8 = 4,50 m.Now assuming that L = 1.80 m and
F / L = 1/20, the curves that can be crossed have the following radius
R = (1.80 x 20): 8 = 4.50 m.

I1 est à noter en particulier qu'avec les courbures du ski classique, on pourrait négocier des courbes ayant un rayon de 100 m et plus, en nécessitant par conséquent une étendue de neige sensiblement plus grande. It should be noted in particular that with the curvatures of conventional skiing, it is possible to negotiate curves having a radius of 100 m and more, consequently requiring a significantly greater extent of snow.

I1 est évident que les rayons de courbure précités peuvent être augmentés ou réduits en pliant plus ou moins les genoux à l'intérieur de la courbe ou bien en opérant par le glissement latéral classique.  It is obvious that the aforementioned radii of curvature can be increased or reduced by bending the knees more or less inside the curve or else by operating by conventional lateral sliding.

Les skis permettent également de franchir des courbes sur des pentes et ils permettent par conséquent de se déplacer aisément sur lesdites pentes ( comme cela a été confirmé expérimentablement ), avec une position différente du skieur. The skis also make it possible to cross curves on slopes and they therefore make it possible to move easily on said slopes (as has been experimentally confirmed), with a different position from the skier.

Conformément à la présente invention, il est prévu également un type de ski qui comporte une concavité très accentuée seulement sur le côté intérieur du ski ( figure 2 ), qui fait en sorte que le skieur franchisse des pentes en déchargeant son poids sur le ski placé en amont alors que, dans les courbes normales, le poids est déchargé sur le ski situé sur le côté extérieur de la courbe. In accordance with the present invention, a type of ski is also provided which has a very accentuated concavity only on the inner side of the ski (FIG. 2), which ensures that the skier crosses slopes by unloading his weight on the ski placed upstream while, in normal curves, the weight is unloaded on the ski located on the outside of the curve.

La présente invention va maintenant être décrite en référence à certains modes de réalisation représentés sur les dessins ci-joints e dans lesquels les figures 1 à 5 représentent des skis ayant un rapport
F/L égal à 1/20 et qui sont adaptés pour des neiges fraiche ou élastique les figures 2, 3 et 6 représentent des skis ayant un rapport F/L compris entre 1/20 et 1/25 et qui sont adaptés pour des neiges normales la figure 4 représente une paire de skis comportant sur le côté intérieur un rapport F/L ~ 1/50 et sur le côté extérieur un rapport F/L =" 1/12 qui est particulièrement adapté pour la neige fraîche. The present invention will now be described with reference to certain embodiments shown in the accompanying drawings e in which FIGS. 1 to 5 represent skis having a ratio
F / L equal to 1/20 and which are suitable for fresh or elastic snow Figures 2, 3 and 6 show skis having an F / L ratio between 1/20 and 1/25 and which are suitable for snow normal figure 4 represents a pair of skis comprising on the inside side a ratio F / L ~ 1/50 and on the outside side a ratio F / L = "1/12 which is particularly suitable for fresh snow.

Claims (5)

REVENDICATIONS 1. Ski comportant au moins un côté présentant une incurvation sur une partie ou la totalité de sa longueur, caractérisé en ce que le côté incurvé a une courbure présentant un rapport entre la flèche et la corde qui est compris entre 1/100 et 1/10.1. Ski comprising at least one side having a curvature over part or all of its length, characterized in that the curved side has a curvature having a ratio between the arrow and the rope which is between 1/100 and 1 / 10. 2. ski comme revendiqué dans la revendication 1, dans lequel ledit rapport est compris entre 1/70 et 1/20.2. ski as claimed in claim 1, wherein said ratio is between 1/70 and 1/20. 3. Ski comme revendiqué dans la revendication 1, caractérisé en ce que ledit rapport est égal sur les deux côtés du ski.3. Ski as claimed in claim 1, characterized in that said ratio is equal on both sides of the ski. 4. Ski comme revendiqué dans la revendication 1, caractérisé en ce que le ski comporte une incurvation sur ses deux côtés, ledit rapport étant différent pour chaque côté du ski.4. Ski as claimed in claim 1, characterized in that the ski has a curvature on its two sides, said ratio being different for each side of the ski. 5. Ski comme revendiqué dans la revendication 1, caractérisé'en ce que l'incurvation est prévue seulement dans une partie intermédiaire du côté du ski, sur un ou bien sur les deux côtés, entre la partie avant et la partie arrière du ski. 5. Ski as claimed in claim 1, characterized in that the curvature is provided only in an intermediate part on the side of the ski, on one or on both sides, between the front part and the rear part of the ski.
FR8502048A 1984-02-16 1985-02-13 SKI WITH AT LEAST ONE SIDE HAVING A STRONG CURVATURE IN ITS CENTRAL PART Expired FR2559673B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8435577U IT8435577V0 (en) 1984-02-16 1984-02-16 SKIING AT LEAST ONE SIDE PRESENTS A STRONG BEND IN A CENTRAL PART

Publications (2)

Publication Number Publication Date
FR2559673A1 true FR2559673A1 (en) 1985-08-23
FR2559673B1 FR2559673B1 (en) 1988-06-24

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FR8502048A Expired FR2559673B1 (en) 1984-02-16 1985-02-13 SKI WITH AT LEAST ONE SIDE HAVING A STRONG CURVATURE IN ITS CENTRAL PART

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AT (1) AT387147B (en)
CH (1) CH662744A5 (en)
DE (1) DE8503842U1 (en)
FR (1) FR2559673B1 (en)
IT (1) IT8435577V0 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230126A2 (en) * 1985-12-13 1987-07-29 K-2 Corporation Asymmetric alpine ski with offset boot platform
FR2594346A1 (en) * 1986-02-19 1987-08-21 Rossignol Sa BASE SKIING
US4688821A (en) * 1985-12-13 1987-08-25 Tristar Sports, Inc. Asymmetric alpine ski with offset boot platform
FR2598929A1 (en) * 1986-05-23 1987-11-27 Salomon Sa PROFILE SKIING
US4795184A (en) * 1986-05-23 1989-01-03 Salomon S.A. Ski with dissymmetrical lateral surfaces
US4869523A (en) * 1986-05-23 1989-09-26 Salomon S.A. Ski with variable dissymmetrical lateral surfaces
US4895388A (en) * 1988-05-17 1990-01-23 Richmond William D Pair of skis
US4961592A (en) * 1987-07-15 1990-10-09 Salomon S.A. Ski having a variable width upper surface
US4971349A (en) * 1986-05-23 1990-11-20 Salomon S.A. Ski having upper and lower surfaces of differing width
US5108124A (en) * 1986-05-23 1992-04-28 Salomon S.A. Ski having improved sliding and gripping properties
US5242187A (en) * 1987-07-15 1993-09-07 Salomon S.A. Ski having a variable width upper surface
EP0579865A1 (en) * 1992-06-19 1994-01-26 ELAN SKI, podjetje za proizvodnjo smuci, d.o.o. Alpine ski
US5286051A (en) * 1990-04-04 1994-02-15 Atomic Skifabrik Alois Rohrmoser Alpine ski with a minimum width and specific width/length ratio
US5405161A (en) * 1994-02-04 1995-04-11 Dennis Young Alpine ski with exaggerated tip and tail
WO1995021662A1 (en) * 1994-02-11 1995-08-17 Karlsen Joergen An alpine pair ski
WO1996022135A2 (en) * 1994-12-30 1996-07-25 Orion Ski S.A. Alpine skis
FR2740693A1 (en) * 1995-11-07 1997-05-09 Skis Lacroix & Co Sa DISSYMMETRIC SKIS FOR SNOW
AT403991B (en) * 1990-04-04 1998-07-27 Atomic Austria Gmbh ALPINSCHI
US6241272B1 (en) 1996-06-27 2001-06-05 Atomic Austria Gmbh Pair of skis for alpine skiing
EP1120137A1 (en) 2000-01-28 2001-08-01 Skis Rossignol S.A. Alpine ski
US6357782B1 (en) * 1998-06-25 2002-03-19 Fischer Geserllschaft M.B.H. Cross-country ski
EP1208879A1 (en) * 2000-11-25 2002-05-29 Gerhard Wendling Shaped ski
US6663137B2 (en) 1998-03-10 2003-12-16 Karlsen Joergen Snowboard
FR2915108A1 (en) * 2007-04-23 2008-10-24 Guy Braymand Carving ski pair for practicing e.g. slalom, has boards whose internal and external radius of curvatures are asymmetrical, where external radius of curvatures is less than internal radius of curvatures relative to longitudinal axes
FR2970658A1 (en) * 2011-01-25 2012-07-27 Decathlon Sa SLIDING DEVICE

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3540428C2 (en) * 1985-05-22 1996-01-18 Anton Plenk Cross-country skis
DE3602492A1 (en) * 1986-01-28 1987-07-30 Plenk Gmbh Langlaufskifabrik G Cross-country ski
DE4112950A1 (en) * 1990-05-04 1991-11-07 Rohrmoser Alois Skifabrik Ski with special plan form - has pointed end and concave sides over middle region
US5618053A (en) * 1990-06-11 1997-04-08 Kneissl Dachstein Sportartikel Ag Short ski-like sports device
US5511815A (en) * 1991-02-07 1996-04-30 Karlsen; Jorgen Alpine style ski
AT400676B (en) * 1991-02-22 1996-02-26 Head Sport Ag SKI
DE19706063A1 (en) * 1997-02-17 1998-08-20 Muenkel Ingrid Skating ski for cross-country skiing
IT201800004339A1 (en) * 2018-04-10 2019-10-10 Marco Covi VARIABLE SKIING

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954679A (en) * 1950-01-04
AT316376B (en) * 1972-08-07 1974-07-10 Fischer Gmbh Ski couple
FR2470614A1 (en) * 1979-11-29 1981-06-12 Fischer Gmbh SKI, IN PARTICULAR ALPINE SKIING

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH266910A (en) * 1947-05-02 1950-02-28 Beerli Louis Skis with partially inwardly curved sides.
CH274723A (en) * 1947-05-02 1951-04-15 Beerli Louis Skis with partially inwardly curved sides.
FR1193933A (en) * 1957-03-29 1959-11-05
AT313136B (en) * 1971-07-07 1974-02-11 Christine Nowak Ski component made of thermoplastic material to accommodate the running edges and the sole covering
DE2335089C3 (en) * 1973-07-10 1979-09-27 Franz Voelkl Ohg, 8440 Straubing Process for producing a ski with upper edge protection strips
FR2270910A1 (en) * 1974-05-16 1975-12-12 Fabris Sergio Monoski for sporting use on snow - used in seated position and guided and stopped by feet each side, folds away for transportation
CA989435A (en) * 1974-09-25 1976-05-18 Alec Pedersen Monoski
DE3126286A1 (en) * 1981-07-03 1983-01-20 Harald 3542 Willingen Strunk Winter sports device having two parallel sliding runners
AT372860B (en) * 1981-12-03 1983-11-25 Fischer Gmbh SCHIPAAR

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954679A (en) * 1950-01-04
AT316376B (en) * 1972-08-07 1974-07-10 Fischer Gmbh Ski couple
FR2470614A1 (en) * 1979-11-29 1981-06-12 Fischer Gmbh SKI, IN PARTICULAR ALPINE SKIING

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0230126A3 (en) * 1985-12-13 1988-01-07 Tristar Sports Inc. Asymmetric alpine ski with offset boot platform
US4688821A (en) * 1985-12-13 1987-08-25 Tristar Sports, Inc. Asymmetric alpine ski with offset boot platform
US4700967A (en) * 1985-12-13 1987-10-20 Tristar Sports Inc. Asymmetric alpine ski with offset boot platform
EP0230126A2 (en) * 1985-12-13 1987-07-29 K-2 Corporation Asymmetric alpine ski with offset boot platform
FR2594346A1 (en) * 1986-02-19 1987-08-21 Rossignol Sa BASE SKIING
EP0235059A1 (en) * 1986-02-19 1987-09-02 Skis Rossignol S.A. Cross-country ski
US4838572A (en) * 1986-05-23 1989-06-13 Salomon S.A. Ski with inclined lateral surfaces
US4795184A (en) * 1986-05-23 1989-01-03 Salomon S.A. Ski with dissymmetrical lateral surfaces
US4858944A (en) * 1986-05-23 1989-08-22 Salomon S.A. Ski with dissymmetrical lateral surfaces
US4869523A (en) * 1986-05-23 1989-09-26 Salomon S.A. Ski with variable dissymmetrical lateral surfaces
US4971349A (en) * 1986-05-23 1990-11-20 Salomon S.A. Ski having upper and lower surfaces of differing width
US5108124A (en) * 1986-05-23 1992-04-28 Salomon S.A. Ski having improved sliding and gripping properties
FR2598929A1 (en) * 1986-05-23 1987-11-27 Salomon Sa PROFILE SKIING
US4961592A (en) * 1987-07-15 1990-10-09 Salomon S.A. Ski having a variable width upper surface
US5242187A (en) * 1987-07-15 1993-09-07 Salomon S.A. Ski having a variable width upper surface
US4895388A (en) * 1988-05-17 1990-01-23 Richmond William D Pair of skis
AT403991B (en) * 1990-04-04 1998-07-27 Atomic Austria Gmbh ALPINSCHI
US5286051A (en) * 1990-04-04 1994-02-15 Atomic Skifabrik Alois Rohrmoser Alpine ski with a minimum width and specific width/length ratio
EP0579865A1 (en) * 1992-06-19 1994-01-26 ELAN SKI, podjetje za proizvodnjo smuci, d.o.o. Alpine ski
US5405161A (en) * 1994-02-04 1995-04-11 Dennis Young Alpine ski with exaggerated tip and tail
WO1995021662A1 (en) * 1994-02-11 1995-08-17 Karlsen Joergen An alpine pair ski
US5876056A (en) * 1994-02-11 1999-03-02 Hi-Turn As Alpine pair ski
WO1996022135A2 (en) * 1994-12-30 1996-07-25 Orion Ski S.A. Alpine skis
WO1996022135A3 (en) * 1994-12-30 1996-10-17 Orion Ski S A Alpine skis
FR2740693A1 (en) * 1995-11-07 1997-05-09 Skis Lacroix & Co Sa DISSYMMETRIC SKIS FOR SNOW
WO1997017114A1 (en) * 1995-11-07 1997-05-15 Surf Politix Europe (S.A.R.L.) Asymmetrical skis for use on snow
US6241272B1 (en) 1996-06-27 2001-06-05 Atomic Austria Gmbh Pair of skis for alpine skiing
US6663137B2 (en) 1998-03-10 2003-12-16 Karlsen Joergen Snowboard
US6357782B1 (en) * 1998-06-25 2002-03-19 Fischer Geserllschaft M.B.H. Cross-country ski
FR2804337A1 (en) 2000-01-28 2001-08-03 Rossignol Sa ALPINE SKIING
US6499759B2 (en) 2000-01-28 2002-12-31 Skis Rossingol S.A. Alpine ski
EP1120137A1 (en) 2000-01-28 2001-08-01 Skis Rossignol S.A. Alpine ski
EP1208879A1 (en) * 2000-11-25 2002-05-29 Gerhard Wendling Shaped ski
FR2915108A1 (en) * 2007-04-23 2008-10-24 Guy Braymand Carving ski pair for practicing e.g. slalom, has boards whose internal and external radius of curvatures are asymmetrical, where external radius of curvatures is less than internal radius of curvatures relative to longitudinal axes
FR2970658A1 (en) * 2011-01-25 2012-07-27 Decathlon Sa SLIDING DEVICE
WO2012101381A3 (en) * 2011-01-25 2012-10-26 Decathlon Sliding device

Also Published As

Publication number Publication date
IT8435577V0 (en) 1984-02-16
AT387147B (en) 1988-12-12
CH662744A5 (en) 1987-10-30
FR2559673B1 (en) 1988-06-24
DE8503842U1 (en) 1985-05-15
ATA44985A (en) 1987-01-15

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