What does the inch symbol of computer flat knitting machine parts mean?

Update:10 Sep 2020
Summary:

The flat knitting machine is the main production equipm […]

The flat knitting machine is the main production equipment for the production of sweaters. The whole machine is made up of more than 130 computerized flat knitting machines. The specifications of the flat knitting machine are based on its needle type and length, that is, there are several grooves per inch (2.54cm) on the needle pointer plate; the length is the horizontal total distance of the needle groove on the needle plate (inch) , Which is the effective length of the needle plate. The specification name of the flat knitting machine is: 3x36, 3.5 x 6, 4X36, 5x36, 6x36, 7x36, 9X36, 11x36, 12x36 and 14x36, the above numbers, the first number pointer type, the back number refers to the length, but the special specifications of the flat knitting machine only Change the name for the length, such as 24 inches, 32 inches, 40 inches, 42 inches and so on.