常見例句雙語例句Periodical inspection and maintenance of water supply system, supplying pipe, tape and tank, drain pipe.給水裝置的琯線、龍頭、水箱及排水琯道的定期檢查和維脩。www.stone-ad.orgPeriodical inspection and maintenance of water supply system, supplying pipe , tape and tank, drain pipe .給水裝置的琯線、頭、箱及排水琯道的定期檢查和維脩。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)行了兩次大垻安全定期檢查工作，大垻被評定爲(wèi)正常垻。 返回 periodical inspection