词语roughing pump
解释低真空泵
词性名词
roughing pump〔名词〕低压真空泵详细»
roughing pump低真空泵详细»
roughing pump〔名词〕粗泵,前泵详细»
低真空泵coarse vacuum pump详细»
低真空泵coarse vacuum pump;roughing pump详细»
低真空泵roughing pump详细»