A.≥1.5kp B.≥0.5kp C.≥1kp D.≥0.05kp
A.≤0.12Mpa B.≤0.007Mpa C.≤0.2Mpa D.≤0.15Mpa
A.≤1.5kp B.≤0.5kp C.≤1kp D.≤0.05kp