模拟试验结论表明，声波法测出的冲击频率与实际频率是一致的，具有可行性。
The result of analogue test shows that frequency of impacter measured by sonic method consists with actual frequency and the method is feasible.
模拟试验结论表明，声波法测出的冲击频率与实际频率是一致的，具有可行性。
The result of analogue test shows that frequency of impacter measured by sonic method consists with actual frequency and the method is feasible.
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