... sewer loss 随排水的流失 sewer valve 排污阀 sewer 下水道,排水沟 ...
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sewer sluice valve 污水管冲洗阀
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wash water valve , waste valves
The invention provides a water discharging device with convenient use, comprising a sluice valve, a water discharging pipe component with the upper end having a water outlet, a sewer pipe;
一种使用方便的放水器,其中包括水闸、上端带有放水口的放水管组件、 下水管;
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