以下为句子列表：
英文: Servo valves consists of feedback - electric-hydraulic servo valve and position feedback servo valves.
中文: 伺服阀主要分为力反馈式电液伺服阀和位置反馈式伺服阀.
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英文: The control principles of 900 MW steam turbine governing valves are introduced, and the data relating to the servo valve installation and debugging are analyzed.
中文: 摘要介绍了900MW机组汽机调门控制原理，分析了伺服安装调试数据。
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英文: When one coil of servo valve is broken, the system works in going order.
中文: 但系统在伺服阀线圈一路断开的情况下，余度伺服作动系统仍能正常工作。
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英文: The Development of Electro Hydraulic Servo Valve Test-Stand QDS--0
中文: QDS--0型电液伺服阀实验台的研制
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