【计】 fractionator
【化】 fractional distillation; fractionation; fractionation by distillation
selective evaporation
circumfluence; refluence
【化】 back flow; circulation reflux; contra-flow; flow-back; reflux
refluxing
【医】 backflow; palirrhea; reflux reflextonus; refluxing; regurgitation
return; return current