Fit the dial gauge holder with the dial gauge so that a right Angle is produced between the dial gauge axis and the measuring lever.
安装好百分表与其支架，从而使百分表轴线与测量杆之间呈直角。
2
Fit special tool dial gauge holder with the dial gauge in such a way that a right Angle is formed between the dial gauge axis and special tool adjustable measuring lever.