plain, terry dual-use computerized sock knitting machine 72-220 needle Cylinder :3.5, 3 ... sock knitting machine (3-3/4″ plain and terry Dual-use)1,One main feed plus five pattern feeds ... .6,Electro-pneumatic yarn finger and cam control7,Pattern Depth up to 1,200 courses.8,Multiple ... protect stored program.15,Internal UPS can support continuous knitting.16,Graphic type LCD adopted.Plain & Terry machine ...