plain, terry dual-use computerized sock knitting machine 72-220 needle Cylinder :3.5, ... 5, 5 inch knit various sock Richrui computerized sock knitting machine (3-3/4″ plain and terry Dual- ... use)1,One main feed plus five pattern feeds.2,Possibility of 13 color plus ground ... protect stored program.15,Internal UPS can support continuous knitting.16,Graphic type LCD adopted.Plain & Terry machine ...