A.<2.5~3kg/cm2 B.>2.5~3kg/cm2 C.<0.15kg/cm2 D.>0.15kg/cm2
A.195g/h B.150g/h C.105g/h D.70g/h
A.0.2~0.5mg/m3 B.40mg/m3 C.0.5mg/m3 D.1mg/m3