Then screw nut did not try to jack up the entire turret components and the weight, the role without friction whereabouts.
这时螺母没有托住丝杆以及整个刀架部件的重量，由于摩擦阻力的作用而不下落。
Then screw nut did not try to jack up the entire turret components and the weight, the role without friction whereabouts.
这时螺母没有托住丝杆以及整个刀架部件的重量，由于摩擦阻力的作用而不下落。
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