以下为句子列表：
英文: Abstract: This paper analysed the kinematic properties of ball joint hi nged on the piston rod and steering drag link of a separated assistant steering m echanism, and the equations of the path and mathematical model of pressure angle were established.
中文: 文摘:分析了分置式转向助力机构的液压缸活塞杆与转向直拉杆相铰接的球头销的运动特性，建立了其轨迹方程及压力角的数学模型。
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英文: According to the principle of curve axial symmetry, authors inferred the theoretical foundation of error-free translation of the working equipment of loader and proved that when the diameter of piston rod on arm oil cylinder was designed properly, the two
中文: 根据曲线轴对称原理，推导出了能使装载机工作装置无误差平移的理论基础，证明了只要适当地设计动臂油缸活塞杆直径，就可以在油缸的基本参数上保证机构工作时两油缸同步运动，使铲斗在作业过程中保持平移；使装载机工作装置结构大为简化，为进一步改进现有装载机工作装置提供参考。
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英文: Hard-chromed piston rod with micro-grooves, increasing the rigidity and reducing friction, keep better lubrication action.
中文: 活塞杆微裂纹镀硬铬，增因硬度减少磨擦，保持油膜润滑效果值。
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英文: In all designs, the valve stem normally serves as a piston rod with disc fastened directly to them.
中文: 在所有结构中，阀杆通常作为活塞杆，阀瓣直接固定在阀杆上。
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英文: Leakage on sealing surface, replaces the sealing piece. If the protrusion of the piston rod leaks oil, replaces the shaft's sealing piece.
中文: 密封面渗漏，更换密封件。如活塞杆伸出处漏油，更换轴用密封件。
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