A.1m2 B.2m2 C.0.01m2 D.0.1m2
A.0~1.6Mpa,0.5級(jí) B.0~2.5Mpa,0.35級(jí) C.0~4Mpa,0.25級(jí)
A.0~1MPa B.0~1.6MPa C.0~2.5Mpa D.0~4.0MPa