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Voltage tester
01
电压测试仪, 电压检测器
a handheld tool used to determine the presence or absence of electrical voltage in a circuit or electrical outlet
Example
Before starting any electrical repairs, it is important to use a voltage tester to ensure the circuit is not live.
在开始任何电气维修之前，重要的是使用电压测试仪来确保电路没有通电。
He used the voltage tester to check if the outlet was providing power before plugging in the appliance.
他在插入电器之前使用了电压测试仪来检查插座是否供电。
