逆止閥backflowing debris: 流入井里的碎屑backflow volume: 回流液量backflush: 倒沖法; 倒沖入賬; 反沖洗; 反向洗滌; 回洗; 逆流洗滌,反流沖洗; 逆算法backflow valve: 回流閥backflush accounting: 倒退成本計(jì)算下載手機(jī)詞典可隨時隨地查詞查翻譯