常見例句雙語例句Periodical inspection and maintenance of water supply system, supplying pipe, tape and tank, drain pipe.給水裝置的管線、龍頭、水箱及排水管道的定期檢查和維修。www.stone-ad.orgPeriodical inspection and maintenance of water supply system, supplying pipe , tape and tank, drain pipe .給水裝置的管線、頭、箱及排水管道的定期檢查和維修。Maojianshan hydropower station has operated for 40 years safely. Two times of periodical inspection has been carried out, and the dam has assessed as normal one.毛尖山水電站已安全運(yùn)行了40年，進(jìn)行了兩次大壩安全定期檢查工作，大壩被評(píng)定為正常壩。 返回 periodical inspection