... the size in the above sheet.STRUCTURE and WORKING PRINCIPLE Structure:1, Tension is constant.The tension of ... on the cable drum do not slip down.Working principle:DJ1D has two kinds operation conditions:1, Power ... this time,the motor of cable drum stop working and skid institutions begin to slip.2, ... time,the motor of cable drum go on working,skid institutions slip faster.INSTALLATION1,Cable reel drum ...