A.1.5~2.5kg/cm2 B.150~250kPa C.21~35psi D.以上皆是
A.15kg/cm2G B.50kg/cm2G C.100kg/cm2G D.150kg/cm2G
A.20kg/cm2G B.100kg/cm2G C.150kg/cm2G D.250kg/cm2G