一个齿轮的齿与另一齿轮的齿相啮合。

The teeth in one wheel engage with those of another.

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转动时齿轮上的齿与齿相啮合。

The teeth on the gears mesh as they turn round.

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主轴的进能量和转速是通过选速杆使主轴箱中的适当齿轮相啮合而控制的。

Spindle feeds and speeds are controlled by selector levers which engage the proper gears in the drill head.

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螺纹杆与齿轮相啮合；改变轴旋转运动的方向。

The spirally threaded shaft of a worm gear.

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其特征是一个与主轴转动配合的齿轮套与两套活塞组的连杆齿条相啮合。

It features in the engaging of the gear sleeve that matches with the rotary of the master shaft and the connecting rod rack of two sets pistons.

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齿条和小齿轮：一种机械装置，由一条矩形截面的杆(齿条)和一个与齿条上的齿相啮合的小齿轮组成。

Rack and pinion: Mechanical device consisting of a Bar of rectangular cross section (the rack), having teeth on one side that mesh with teeth on a small gear (the pinion).

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齿条和小齿轮：一种机械装置，由一条矩形截面的杆(齿条)和一个与齿条上的齿相啮合的小齿轮组成。

Rack and pinion: Mechanical device consisting of a Bar of rectangular cross section (the rack), having teeth on one side that mesh with teeth on a small gear (the pinion).

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