当锥度环规的外径不大于70mm 时,其孔径的测量可在万能测长仪上利用电眼装置进行。此方法调整方便,计算简单,精度较高,现介绍如下:如图1安装好测钩1和测头2,将绝缘工作台4调至水平,并接好与电眼的连接插头。用两块等高的量块7(或其它平行性好的等高块)垫在环规3下面,并将量块的一半露在孔 When the outer diameter of the taper ring gauge is not more than 70mm, the measurement of the aperture can be performed on the universal length gauge using the electric eye device. This method is easy to adjust, simple calculation, high accuracy, are introduced as follows: Figure 1 installed hook 1 and probe 2, the insulation table 4 transferred to the level, and then connected with the electrical eye plug. Use two equal height blocks 7 (or other parallel blocks of equal height) under the ring gauge 3 and expose half of the block to the hole