... 螺母丝锥 nut tap 螺母心轴 nut mandrel 螺母压机 nut press ...
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The utility model is of bridge type structure of right and left upright pillars adding top beam, the lifting device with nut screw mandrel is moving along the upright pillars.
本实用新型为左右立柱加顶部横梁的桥式结构，螺母丝杆升降装置沿立柱上下移动。
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模块上移
模块下移
不移动