In order to water pump suction pipe, memory, import needs bottom valve pump working, bottom valve caused great losses.

为了在泵内存水，吸入管进口需要装底阀，泵工作时，底阀造成很大的水力损失。

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The pump sucks air out through the valve.

气泵通过阀门把空气抽出去。

《牛津词典》

7 hr 30 min Even after operators pump water into the primary loop, pressure is still high. The PORV 'backup valve is opened to lower the pressure.

7小时30分钟尽管操作员已将水抽入主回路，但温度仍然很高。减压阀的备用阀门被打开，减少压力。

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Tyco (NYSE:TYC) spun off its ADT Corp. (NYSE: ADT) alarm security business as a separate public company on October 2 after selling its pipe and valve business earlier this year to pump maker Pentair.

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The valve that failed last Saturday was in a pump house, Cunha explained, so the seven-year risk analysis is still good.

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