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在铣、刨、钻床加工锥形或不规则工件时,用一般平口钳装夹,不易夹牢。而使用钢珠支点夹板(附图),能方便地夹紧工件。使用时将其中一
In the milling, planing, drilling taper or irregular workpiece processing, with the general flat-jaw clamp, not easy to clip. The use of steel ball pivot plywood (with photos), can easily clamp the workpiece. Use one of them