A.7.7~7.5mmB.7~7.4mmC.7.8~8mm
A.2mmB.3mmC.4mmD.5mm
A.蒸餾設(shè)備B.換熱設(shè)備C.蒸發(fā)設(shè)備D.反應(yīng)設(shè)備