回动空转轮轴
Drive idler gear reverse idler gear shaft bearing
空转传动齿轮,怠速齿轮
Reverse idler gear shaft bearing Both gear centers have pinions with only half tooth.
回动空转齿轮轴轴承两个齿轮其中心都有一个小齿轮,这个小齿轮只有半边有齿轮。
Discussion on Teaching of the Perpendicular Axis Theorem of the Moment of Inertia of a Rigid Body; reverse idler gear shaft bearing
刚体转动惯量正交轴定理的教学探讨
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