half-wave vibrator

例句：

1. 1. The half-wave vibrator is used to measure the electrical resistance of materials.
   半波振动器用于测量材料电导率。
2. 2. The half-wave vibrator was designed to improve the accuracy of the measurement device.
   半波振动器被设计用来提高测量设备的精度。
3. 3.The half-wave vibrator was used to detect the presence of a fault in the circuit.
   半波振动器被用来检测电路中是否存在故障。