At this point the dial gauge extension is positioned exactly at a right Angle to the front face of the pinion head.

达到此点时，百分表加长杆正好与小齿轮头部的前面成直角。

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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。

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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.

安装带有百分表的专用工具百分表架，使百分表轴线与专用工具可调测量杆之间呈直角。

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