A.25%~50% B.24%~50% C.21%~35% D.21%~55% E.52%~100%
A.50:50 B.40:60 C.30:70 D.70:30 E.60:40
A.來(lái)回吸收密閉式裝置 B.開(kāi)放式和無(wú)活瓣裝置 C.循環(huán)吸收密閉式裝置 D.半密閉式裝置 E.簡(jiǎn)單活瓣裝置