... knit various sock Max speed: 320rpm 3-1/2"plain computerized sock knitting machine Feature: 1,One main feed plus five pattern feeds ... function.10,Attached floppy disk driver(Compatible with MS-DOS and WINDOWS)11,Available in 220/380/415V.3phase 50/60HZ ... .12,Fully A.C Servo motor adopted.13,Minimized and easy operating function.14,battery back-up to protect stored ...