A.6~9 B.0.6~0.9 C.0.06~0.09 D.0.06~0.1
A.0.25~0.40 B.0.40~0.50 C.0.50~0.60 D.0.30~0.40
A.無(wú)毒氣體 B.無(wú)害氣體 C.易燃?xì)怏w D.升壓較低氣體