A.下料→冷拉→對(duì)焊 B.冷拉→下料→對(duì)焊 C.下料→對(duì)焊→冷拉 D.對(duì)焊→冷拉→下料
A.30% B.50% C.75% D.100%
A、螺絲端桿錨具 B、JM-12型錨具 C、鐓頭錨具 D、幫條錨具