micro-galvanometer

例句：

1. 1. The micro-galvanometer is used to measure the resistance of a circuit.
   微伏表用于测量电路的电阻。
2. 2. The micro-galvanometer was used to detect the presence of a magnetic field.
   微伏表被用来检测磁场的存在。
3. 3. The micro-galvanometer was used to measure the voltage across a resistor.
   微伏表被用来测量电阻两端的电压。