Tea polyphenols from the Fenghuang tea of Chaozhou was extracted by ultrasonic wave technology with orthogonal test method in this study.
以潮州凤凰茶为原料，用超声波法提取茶多酚，通过正交试验确定最佳提取工艺。
The system uses ultrasonic wave as signal source, with the multi-probe multi-directions sweep, and fluid soak method test the gear.
系统以超声波作为检测信号源，采用多探头多方位扫描、液浸法的方式对齿轮进行检测。
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