headwork造句
TheKashiRivercanalheadworkwasbuiltonthebasisoftheLingongcanal.ThispaperdiscussesexistentproblemofheadworkatYuelaiIrrigationAreainHuachuanCountyandadoptablemeasures.Havingbeeninservicefor123years,theLi...
TheKashiRivercanalheadworkwasbuiltonthebasisoftheLingongcanal.ThispaperdiscussesexistentproblemofheadworkatYuelaiIrrigationAreainHuachuanCountyandadoptablemeasures.Havingbeeninservicefor123years,theLi...