凹槽千分尺146系列特点?千分尺心轴上带有凸缘，可用来测量凹槽内／外孔和管材内外凹槽深度和位置关系?提供两种分度值分别用来进行内部和外部测量。?心轴非旋转型带有双向的棘轮锁定装置。性能参数公制型测量范围外部测量范围内部货号凸缘0-25mm1.6-26.5mm146-121?6.35mm146-122?12.7mm25-50mm26.5-51.5mm146-123?12.7mm50-75mm51.5-76.5mm146-124?12.7mm75-100mm76.5-101.5mm146-125?12.7mm公制型测量范围外部测量范围内部货号凸缘0-25mm1.6-26.5mm146-221?6.35mm146-222?12.7mm25-50mm26.5-51.5mm146-223?12.7mm50-75mm51.5-76.5mm146-224?12.7mm75-100mm76.5-101.5mm146-225?12.7mm