Working results show that the non-contact testing system is highly accurate and reliable, and is easy to use.
实际应用结果表明，该系统具有测试精度高、可靠性强、使用方便等优点。
Device must be needed for experiment and observation in order to research the influence of dust in electric contact testing.
而要研究在电接触测试中尘土颗粒的影响，就必须有相应的设备仪器进行实验和观测。
Device must be needed for experiment and observation in order to research the influence of dust in electric contact testing.
而要研究在电接触测试中尘土颗粒的影响，就必须有相应的设备仪器进行实验和观测。
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