1.可方便地进行多种难测量特殊场合的测量工作 Easy ro do measurements in hard-to-reach locations. 2.用于管径、管壁厚、轴槽台阶、高度尺寸以及各种窄小尺寸的测量 To measure tube thickness,shoulder-edge distance. 3.硬质合金和合金钢量面 Carbide and hadrened steel contact points..
