常見(jiàn)例句雙語(yǔ)例句Diseussion about the course during molding and easting of negative pressure dry-sand EPC has been expounded.本文針對(duì)負(fù)壓消失模鑄造的造型與澆注過(guò)程中存在的問(wèn)題進(jìn)行了研究。 返回 dry sand mold