精密三点式内径千分尺精密三点式内径千分尺套装：适用于盲孔和通孔的精密测量，配有接长杆可测量深孔尺寸，硬质合金测量面,外表面镀铬：棘轮测力货号单测量范围校对环规接长杆375-22-1102-2.5，2.5-3mm 2.5mm/375-33-1103-4,4-5,5-6mm 4,5,6mm/315-44-2106-8,8-10,10-12mm 6,8,10mm100mm315-44-0706-8,8-10,10-12mm 6,8,10mm100mm315-46-07012-16,16-20mm 16mm150mm315-47-07020-25,25-30,30-40mm 25,40mm150mm315-48-07020-25,25-30,30-40,40-50mm 25,40mm150mm315-49-07040-50,50-63,63-75,75-88,87-100mm 40,62,87,mm150mm315-50-07050-63,63-75,75-88,87-100mm 62,87,mm150mm