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硬质钨钢合金球45.46/45.465/45.47/45.475/45.48mm扩孔挤孔钢球
GB812圆螺母.螺帽.带槽锁紧圆螺母M10*1 M12.20.27.36.45.48*1.5
硬质钨钢合金球45.46/45.465/45.47/45.475/45.48扩孔挤孔钢球
硬质钨钢球合金球45.455/45.46/45.465/45.47/45.475/45.48mm钢珠
双林圆板牙/杭州细牙元板牙M33.36.39.42.45.48.52*1/1.5/2/3二圈