技术参数
1.用于测量内径尺寸 For internal measurement.
2.带可换测头，测量范围大 Changeable anvils for wide measuring ranges.
3.百分表完全用坚固的防护罩保护 With indicator protective cover.
4.插入式可换测头，使用方便 Interchangeable contact points, easy to use.
5.滚轮式定位护桥 Roller aligning bridge.
6.配φ57mm普通表圈百分表 Equipped with a φ57mm dial indicator.
