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介绍了等精度测频法的原理，并应用该原理对疲劳试验机电机转速转数进行了数字化测量及显示，通过与测周法比较，得出了这种原理的优越性。
The principle of equal precision frequency measurement method is introduced, and the principle of this method is used to digitally measure and display the rotation speed of the fatigue testing machine. The superiority of this principle is obtained by comparing with the measuring week method.