以下为句子列表：
英文: 3 Sash cables shall be constructed from sturdy material. A steel wire and sprocket system is preferred for its strength and durability.
中文: 移门铰链由坚固的材料构成。一般为钢铰链和链齿轮。
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英文: A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes.
中文: 脱轨器，转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮（换档）的装置
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英文: A tooth of a sprocket wheel.
中文: 扣链齿链轮上的一个扣链齿
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英文: By means of researching the meshing impact in the engagement of standard chain respectively with the spur toothed sprocket and the involute toothed sprocket, it has been discovered through analysis that by adopting the involute tooth for the sprocket coul
中文: 通过研究标准链条分别与直齿链轮和渐开线齿链轮啮合的啮合冲击，分析发现在链轮上采用渐开线齿能减小链条与链轮啮合瞬间的法向冲击速度，进而降低链条与链轮的啮入冲击。
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英文: Final drive is two-stage planetary reduction gear mechanism. It is mounted at outside of steering and braking clutch. Combined sprocket segment is very convenient for assembling, disassembling and service.
中文: 终传动为两级行星传动减速机构，装在转向与制动离合器外侧，组合式链齿、拆装，维修极其方便。
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