368系列 三点内径千分尺(硬质合金测砧)组合套装货号单体测量范围环规延长杆368-906 2-2.5,2.5-3mm 2.5mm 368-907 3-4,4-5,5-6mm 4mm, 5mm 368-901-106-8,8-10,10-12mm 8mm, 10mm带有延长杆368-912 12-16,16-20mm 16mm 带有延长杆368-913 20-25,25-30,30-40,40-50mm 25mm, 40mm 带有延长杆368-914 50-63,62-75,75-88,87-100mm 62mm, 87mm 带有延长杆368-915100-125,125-150,150-175,175-200mm 125mm, 175mm带有延长杆