... terry dual-use computerized sock knitting machine 72-220 needle Cylinder :3.5, 3.75, 4 ,4.5, 5 inch knit various sock Richrui computerized sock knitting machine (3-3/4″ ... system4,Exclusive inner cam block system for high speed.5,Stepping motor for elastic yarn and stitch cam ... 15,Internal UPS can support continuous knitting.16,Graphic type LCD adopted.Plain & Terry machine can produce the following:1- ...