... Cylinder :3.5,3.75, 4, 4.5,5 inch knit various sock Max speed: 320rpm 3-1/2"plain computerized sock knitting machine ... plus ground or the same course.3,Drumless,fully electronic control system4,Exclusive inner cam block system ... in 220/380/415V.3phase 50/60HZ.12,Fully A.C Servo motor adopted.13,Minimized and ... ,leg and foot 7- Tube sock 8- Double welt folding socks 9- Picot design 10- Single hand linking ...