三爪内径千分尺特点：硬质合金测量表面（测砧）确保高耐磨度,三爪硬质合金圆柱不易磨损可接近盲孔底端进行测量为恒值力测量提供棘轮锁定装置通过精密环规（选件）进行零点调节 技术参数：货号测量范围（mm）分度值（mm）允许误差（mm）L（mm）b（mm）c（mm）271-1516-80.0010.004302.51.5 8-100.0010.004302.51.5 10-120.0010.004302.51.5271-15411-140.0050.004486.30.4 14-170.0050.004486.30.4 17-200.0050.004486.30.4271-15720-250.0050.004509.20.4 25-300.0050.004509.20.4 30-350.0050.004509.20.4 35-400.0050.004509.20.4271-16140-500.0050.0055516.50.5 50-600.0050.0055516.50.5 60-700.0050.0055516.50.5 70-800.0050.0055516.50.5 80-900.0050.0055516.50.5 90-1000.0050.0055516.50.5