... indirect waste pipe 间接排水管 main waste pipe 主要废水管 accepted waste pipe 共用废水管 ...
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Waste draining pipe, offlet or drain pipe should be connected to the main pipe; each pipe should connect two valves with the most possible short valve-to-valve pipe length.
排污管、放水管或疏水管应分别连接到各自的总管上，每管均应串接两个阀门，两阀门间的管段应尽量缩短。
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