施加电压电压测试
voltage source voltage measurement
压电电压常数
piezoelectric voltage coefficient
Piezoelectric voltage constant
压电电压反馈
piezoelectric voltage feedback
地线返回电流
return current of ground wires
返回电流系数
return current coefficient
电压回路自动切换
automatic switching over design of voltage circuit
二次电压回路
secondary voltage circuit
二次电压回路故障
secondary voltage circuit fault