... 上流压力 Up-stream pressure 下流压力 Down-stream pressure 恢复压力 Build up of pressure ...
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Requirement: Air inlet must start to open when down stream pressure is 1.0 PSI or above.
要求：当下游流体压力在1.0 PSI及以上时，空气进口必须开始打开。
Lug style valves shall be capable of providing bidirectional "Dead End Service" at full pressure without the need for down stream blind flange.
凸耳式阀门应该有能力在全压力下提供双向“终端应用”，不需要下游蒸汽无口法兰。
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