... frequency conversion .2.Single receiveing line ,automatic changer double vertical take-off devices and wire bound set for the users' matching .A ... . (automatic bobbin-change at preset length)1.10. Size of take-up bobbin: PND500/PND6301.11. Max. traverse width: 460mm1.12 ... final capstan: Z4-200-21, 75kw, DC, 1500 rpm1.14. Take-up motor (2 No.s): Z4-132-2, 22kw, 3000rpm1 ...