High Speed Back-twisting Machine 1,For CAT5E,CAT6,CAT7 2,Motorized take-up with constant tension 3,Accurrate twist distance 1 ... ,3+3 ditch,pecision potentionmeterPay-off deviceAccumulative type tension sensor stand,inked with pay-off motor,ensure constant tension in ... *2000Total weightAbout 2200kg Motorized take-up with constant tansion HR-DB-500/630(bobbin size) High Speed Pair Back-twisting Machine