冲洗水管 meaning in English

wash tub pipe

Rock drilling ; water tube ; connecting dimensions , material , finish
凿岩.冲洗水管.连接尺寸材料和精加工
If the system is not flushed until after the backflow valve is installed , remove both check modules from the valve and open the inlet shutoff to allow water to flow for a sufficient time to flush debris from the water line
如果在安装回流阀之前系统还为冲洗，则从阀门上拆卸两个止回阀模块，开启进口关闭阀，让水流过足够长的时间来冲洗水管内的堆积物。