Circulating water pump inlet pipe and outlet pipe should also install pressure gauge.

循环水泵的进水管和出水管上也应装压力表。

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The design and lectotype of circulating pump, automatic return water switch valve, expansion tank and atmospheric connection pipe in atmospheric hot water heating boiler room are discussed.

对常压热水供热锅炉房的循环泵、回水自动启闭阀、膨胀水箱、大气连通管的设计选型进行了探讨。

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A circulating pipe is connected with a washing water outlet and a washing water inlet on the washing drum.

循环管道上水泵的吸水口连接洗涤水出口，排水口连接洗涤水进口。

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The authors suggest that a rapidly evolving technical to manage hydrates is to heat the pipes that carry the hydrocarbons to the surface, either through electric heaters or by circulating hot water around the outside of the pipe.

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