backweight 平衡錘backway n.后退距離backwaterpump [機(jī)械工程]回水泵backwaterlevel [經(jīng)濟(jì)學(xué)]回水高程backwater zone [農(nóng)業(yè)科學(xué)]回水區(qū)backwater variation area [農(nóng)業(yè)科學(xué)]回水變動區(qū)backwater valve [機(jī)] 回水閥backwater surface 回水面backwater limit [經(jīng)濟(jì)學(xué)]回水極限backwater function 回水函數(shù)backwater area [環(huán)境科學(xué)技術(shù)]回水區(qū)backwater (n.) backwater n. 回水；死水；停滯不進(jìn)的狀態(tài)或地方backwasting [能源科學(xué)技術(shù)]冰前消退作用backwashings n.回洗液backwashing method [地球科學(xué)]回哩backwashing 回洗,反萃取,反流,倒流,反濺,反噴,逆流沖洗,反向洗滌backwasher 復(fù)洗機(jī)backwashed 反沖洗backwash water 反洗水 回洗水 反沖水 反洗沖水濾池