铁路通信电源
power supply of railway communication system
无源RC带通选频电路
RC Passive Bandpass Network
泵电源电路的运行
pump power circuit operation
起动机电磁线圈电源电路
starter solenoid power circuit
应急电源电路断路器
emergency source circuit breaker
直流电源电路
Direct current of stable voltage circuit
爆电电源
ferroelectric power supply