所述小齿轮分别设置在所述轨道上并能够在与所述齿条的齿啮合的情况下移动。
The pinions are respectively disposed at the rails and movable in mesh with the teeth of the rack.
第二齿条，其被安装来在所述外壳内做直线运动，所述第二齿条与所述第二小齿轮啮合，以便所述第二小齿轮的转动直线地移动所述第一齿条；
A second rack is mounted for linear movement in the housing. The second rack engages with the second pinion gear such that rotation of the second pinion gear linearly moves the first rack.
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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