母丝杠 chasing leader; chasingleader; master screw 丝杠，螺杆 lead screw ..
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... chasing hammer 嵌花锤; 修整铸件锤 chasing lathe 螺纹车床 chasing leader 母丝杠 ...
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短语
纵向丝杠螺母
longitudinal lead screw nut
丝杠螺母副间隙
the gap between the lead screw and screw nut
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