A.100∶0.1mmB.100∶0.3mmC.100∶0.5mmD.100∶0.8mm
A.Ra≤0.4μmB.Ra≤0.8μmC.Ra≤1.6μmD.Ra≤3.2μm
A.0.1μmB.0.4μmC.0.8μmD.1.0μm