![headwork造句怎麼寫]( "headwork造句怎麼寫")
- TheKashiRivercanalheadworkwasbuiltonthebasisoftheLingongcanal.ThispaperdiscussesexistentproblemofheadworkatYuelaiIrrigationAreainHuachuanCountyandadoptablemeasures.Havingbeeninservicefor123years,theLingongcanalwasreplacedin1967bythiscanalheadworkinfr...
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