以下为句子列表：
英文: Abstract: The seriousness of the actuating medium pollution at hydraulic pressure system is introduced,the importance conducting analysis of pollution and the harmfulness of pollution are explained,and some measures to control the pollution are put forwar
中文: 文摘:介绍了液压系统工作介质污染的严重性，说明了进行污染分析的重要性和污染带来的危害，并列出控制污染的几种措施。
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英文: Abstract: To introduce the hydraulic pressure system of testing pressurevalve,and expound how to operate the system to test the discharge valve,the paper puts forward items and methods of testing discharge valve.
中文: 文摘:介绍了压力阀试验液压系统，阐述了如何操作这个系统对溢流阀进行测试，以及对溢流阀的测试项目和方法。
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英文: Adopting hydraulic pressure and pneumatic components manufactured by Taiwan manufacturer,this machine owns reliable and steady performance.
中文: 本机液压、气动元件采用台湾厂家产品，性能可靠稳定。
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英文: Air pressure, hydraulic pressure or electrical supply available to actuator.
中文: 执行机构所采用的气源压力，液源压力，或电源。
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英文: Based on mechanics of fracture, and regarding thermal stress caused by temperature difference and static hydraulic pressure caused by fracture water as the main factors, the forecast of collapse period of dangerous rock is researched through different com
中文: 摘要以断裂力学爲基础，以温度差引起的热应力及裂隙水引起的静水压力爲主要影响因素，通过不同的断裂类型组合形式研究了危岩垮塌的周期，提供了一种计算危岩垮塌周期的方法。
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