openvino_tiny-yolov3_MultiStick_test.py variables mean?

[chimaek]

[Required] Your device (RaspberryPi3, LaptopPC, or other device name):
RaspberryPi3 + NCS2
[Required] Your device's CPU architecture (armv7l, x86_64, or other architecture name):
armv7l
[Required] Your OS (Raspbian, Ubuntu1604, or other os name):
Raspbian

openvino_tiny-yolov3_MultiStick_test.py

yolo_scale_13 = 13
yolo_scale_26 = 26
yolo_scale_52 = 52

classes = 80
coords = 4
num = 3
anchors = [10, 14, 23, 27, 37, 58, 81, 82, 135, 169, 344, 319]

Can you tell me what the above variables mean?