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叙述了一种新的双频激光干涉转速测量方法，详细分析了这种方法的工作原理，确定了转速测量范围，给出实验结果并进行了精度分析。
A new measurement method of dual-frequency laser interferometer rotation speed is described. The working principle of this method is analyzed in detail. The measurement range of rotation speed is determined. The experimental results are given and the precision analysis is carried out.