For high frequency, or low amplitude measurement, probe ground shall be connected to appropriate points in the circuit under test.

对于高频或低幅值测量﹐探头的地应接到测试电路中的适当位置。

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Results 40 cases appendicitis patients, low frequency probe with 35% detective rate, and high frequency probe for the detection rate of 87.5%.

结果40例阑尾炎患者，低频探头超声论断符合率为35%，而高频探头检测符合率为87.5%。

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