感应式过电压继电器
induction type over-voltage relay
induction type overvoltage relay
活塞式过电压继电器
plunger type overvoltage relay
旋转衔铁式过流继电器
rotating-iron type overcurrent relay
光电式继电器电表
photoelectric relay meter
旋转衔铁式欠压继电器
rotating-iron type undervoltage relay
旋转压电式换能器
roating piezoelectric transducer
感应式低电压继电器
induction type under-voltage relay
活塞式欠电压继电器
plunger type undervoltage relay