A.1.1-2.0 B.1.2-2.1 C.1.6-2.5 D.1.7-2.5
A.0.7-1.2 B.0.8-1.3 C.0.5-1.1 D.0.6-1.0
A.熱交換 B.熱補(bǔ)償 C.清掃方便