A.反應(yīng)-再生系統(tǒng)B.分餾系統(tǒng)C.吸收穩(wěn)定系統(tǒng)D.原料精制系統(tǒng)
A.5sB.10sC.15sD.20s
A.汽提B.提餾C.分餾D.分離