扬声器连通度(Speaker connectivity)测试，和扬声器输出测试；关键点电压 (Key Points Voltage) 测试。UUT成品测试、校准，分成4个部分：
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The paper expatiates key points such as elements choosing and notices in design in particular because magnetic stimulator is high voltage, large current device.
由于磁刺激器是高电压、大电流的装置，本文对元器件的选择、设计中的注意事项等关键问题特别进行了阐述。
In this paper, the design principle and key technical points of a new intelligent low-voltage circuit breaker monitoring system based on CAN bus and GPRS is presented.
介绍一种基于GPRS远程通信网络及CAN总线技术的新型智能低压断路器监控系统的设计要点、主要工作原理及其关键技术。
Causes for safety accidents were analysed, with summary on the method for its correct use and key points and evaluation analysis for the uncertainty of site voltage measurement.
分析了其安全事故发生的原因，总结了对其正确使用的方法和要点，并对现场电压测量的不确定度进行了评定分析。
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