常見例句雙語例句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；ip.com 返回 water sluice valve