n. 逆流, 矛盾的倾向, 相反的倾向

cross-current classifier, gravity air separator, aspiration duct, inertial separator

trickle condenser with both cross-current and counter-current

cross-current plate heat exchanger

cross-current dryer

cross-current solvent extraction

cross-current furnace

cross-current trickle condenser

cross-current classifier