A.0.1MPa~0.2MPa B.0.3MPa~0.5MPa C.0.6MPa~1MPa D.1MPa~1.5MPa
A.<10mL/h(15~30滴) B.<20mL/h(30~60滴) C.<30mL/h(45~60滴) D.<50mL/h(50~80滴)
A.≥0.1MPa B.≥0.2MPa C.≥0.3MPa D.≥1MPa