介绍了一种声波法测冲击器频率的方法。
The paper introduces a kind of sonic method by which frequency of impacter is measured.
目的：采用超声波法提取云芝胞内胃蛋白酶抑制剂。
Objective:To extract Coriolus versicolor intracellular pepsin inhibitor based on ultrasonic method.
研究超声波法提取南瓜果肉胡芦巴碱最优工艺条件。
The optimum ultrasonic extraction technology of trigonelline in pumpkin flesh was studied.
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