1、Hands on with the all mechanical measuring instruments like Micrometer, dial bore gauge, Vernier, Height Gauge etc.
3、The present invention has the advantage that the measurement data of the diameter value of the inner bore with the bore gauge in specific depth is accurate due to high locating accuracy.
2、是龍,你得盤着,是虎,你得卧着,做人,還得夾着尾巴,你是根棍就把它放在門後邊.