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.
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
阀门，两阀门间的管段应尽量缩短。
管；疏水管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.
污管、放水管或疏水管应分别连接到各自的总管上，每管均应串接两阀门，两阀门间的管段应尽量缩短。
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