模具英语under cover是模具中哪个部件?中文怎么说?塑料模具under cut,不是under cover

模具英语under cover是模具中哪个部件?中文怎么说?塑料模具under cut,不是under cover 在外贸英语中," under separate cover Under Cover of Darkness 歌词 汽车零部件里面,“under cover”应该译成什么? under under separate cover 可以翻译（我们）另外做.. cut puppy put under哪个发音不同 汽车零件英语以下的几个求大神帮忙：STRAKE,REAR,R、COVER COMP,I/P UNDER ASST 英语中under the weather 英语翻译stage under a sturdy table or desk.cover your head,neck 英语翻译Our sample is attached under separate cover.As we have r 英语翻译Stand inside a door,or under some cover.为什么stand不用ing或to