三点内径千分尺性能参数测量范围货号分辨率精度6－8mm486-1310.001mm2um8-10mm486-1320.001mm2um10-12mm486-1330.001mm2um12-16mm486-134-100.001mm2um16-20mm486-135-100.001mm2um20-25mm486-136-100.001mm3um25-30mm486-137-100.001mm3um30-40mm486-138-100.001mm3um40-50mm486-139-100.001mm3um50-63mm486-140-100.001mm3um62-75mm486-141-100.001mm3um75-88mm486-142-100.001mm3um87-100mm486-143-100.001mm3um100-125mm486-144-100.001mm5um125-150mm486-145-100.001mm5um150-175mm486-146-100.001mm5um175-200mm486-147-100.001mm5um200-225mm486-148-100.001mm5um225-250mm486-149-100.001mm5um250-275mm486-150-100.001mm5um275-300mm486-151-100.001mm5um