管道布置上面的一句话？ 例句：swing check valves prevent reversal of flow through pipe lines. 旋启式止回阀可以防止管路中的流体倒流。 for steady flow in large lines discharging against high heads, or where back-flow may occur which can induce severe hydraulic hammer, weighted swing checks shall be used to ensure closing prior to occurrence of back-flow. 对于高压头下流出大管径的稳定流体，或会造成严重水击的发生回流/倒流的地方，. 在回流发生之前应采用重力式旋启止回阀，以确保关闭/关牢。 by the way，这里的weighted swing checks 是weighted swing check valves的意思。查看更多
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