copper voltameter

例句：

1. 1.The copper voltmeter was used to measure the voltage across the circuit.
   铜电压表被用来测量电路两端的电压。
2. 2.The engineer carefully checked the copper voltmeter readings before making any adjustments.
   工程师在做出任何调整之前，仔细检查了铜电压表的读数。
3. 3.The copper voltmeter was essential for detecting faults in the electrical system.
   铜电压表对于检测电气系统中的故障至关重要。