[物理] 预制机器零件的装配 prefabricated parts: 预制构件; 预制件; 预组购件precast parts, prefabricated parts: 预制构件prefabricated or preformed parts: 预制及预成形件prefabricated parts plant: 建筑构件厂assembly and parts: 部件下载手机词典可随时随地查词查翻译