基本解釋干砂型英漢例句雙語例句Diseussion about the course during molding and easting of negative pressure dry-sand EPC has been expounded.本文針對負壓消失模鑄造的造型與澆注過程中存在的問題進行了研究。dry sand mold更多例句專業(yè)釋義機械工程干砂模法