今天使用的许多万用表仍在利用电磁表头的运动来作为指示刻度之用。
Many multimeters used today still use the magnetoelectric meter movement as an indicating device.
其实质是该磨钻头活动卡规是由主卡规和副卡规构成，卡心角与被卡钻头的锋角心位于同一条轴心上并在其卡规上设有指示刻度。
A clamping center Angle and the sharp Angle center of the clamped drill are positioned on the same shaft center, and the gauges are provided with indication graduations.
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