A.1:100000 B.1:200000 C.1:300000 D.1:400000 E.1:500000
A.<50~100μm B.<50~200μm C.<50~250μm D.<50~150μm E.<100~150μm
A.≥0.15N·m B.≥0.25N·m C.≥0.35N·m D.≥0.45N·m E.≥0.55N·m