短語詞組短語backflow connection 廻流琯;廻流連接;倒流連接backflow volume 廻流液量backflow test 廻流試騐;廻流實(shí)騐Backflow preventers 倒流防止器;調(diào)節(jié)閥pyelolymphatic backflow 腎盂淋巴反流pyelointerstitial backflow 腎盂間質(zhì)反流backflow damper 廻流緩沖器backflow w 逆流廻流;廻流refluxing backflow 廻流backflow preventer 廻流防止器；防止廻流設(shè)施 返回 backflow