power operated relief valve
... power loss 落空电源 power operated relief valve 动力操作卸压阀 power operation 功率运行 ...
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power operated relief valve
电动安全阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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There are four types for PWR pressure-relieving devices: direct acting safety valve, pilot-operated pressure relief valve, power-operated pressure relief valve and safety valve with auxiliaries.
PWR的压力释放装置主要有四种类型：直接作用式安全阀、先导操作压力释放阀、动力作用式压力释放阀和具有辅助装置的安全阀。
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