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Reciprocating pump discharge pipe must be before the start of the valve to open.
往复泵启动前必须将排出管路中的阀门打开。
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Do not let pump run for long in the circumstance of discharge valve closed.
注意不要在排出阀关闭的状态下长期运转。
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Do not let pump run for long in the circumstance of discharge valve closed.
注意不要在排出阀关闭的状态下长期运转。
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