sewer valve
常見例句
- The relief valve should never be solidly piped into a drainage ditch, sewer or sump.
安全閥絕不能用堅硬的管道連接到排水溝、水管或污水坑里。 - 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;
一種使用方便的放水器，其中包括水閘、上端帶有放水口的放水管組件、 下水管；
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