磁耦合离心泵的全新设计: a completely new design for mag-drive centrifugal pumps
回来: 回来return; come back; be back; go back; turn one's steps back; on one's returm from; put sth. back 短语和例子我一会儿就回来。 i'll be back in a minute. 他在一星期左右以后回来。 he will return in a week or so. 她们刚旅行