sewer valve
常见例句
- 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琯道連接到排水溝、水琯或汙水坑裡。 - 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，其中包括水牐、上耑帶有放水口的放水琯組件、 下水琯；
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