以下为句子列表：
英文: According to the control rod hydraulic drive mechanism(CRHDM)and the characteristics of its hydraulic cylinder seal structure, the leaking ways of the hydraulic cylinder piston ring seal were analysed, its theoretical calculation model was built and its f
中文: 摘要根据控制棒水压驱动机构水压缸活塞环密封结构的特点，分析了水压缸活塞环的泄漏途径，建立了活塞环密封泄漏流阻的理论计算模型，并结合水压缸活塞环密封处的压差计算模型，推导出水压缸密封结构的流阻计算公式。
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英文: Adopt, the adjustable control rod that with reference line and locking device,more easily for adjusting Z stitch.
中文: 加宽同步齿形轮结构，有效地防止同步齿形带跳齿，同时使机器噪音大大降低，缝纫性能更加稳定。
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