sewer valve
常见例句
- The relief valve should never be solidly piped into a drainage ditch, sewer or sump.
安全阀绝不能用坚硬的管道连接到排水沟、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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