双电源切换
duplicate supply switching
dual power switch
双电源双回线
double- circuit line with power source at each end
单电源双回线
double- circuit line with a power source at one end
双路电源控制器
dual step-down controller
双路电源自动切换控制模块
double road power supply automatically transfer control module
双母线电压切换回路
Double-bus voltage switching return
double busbar voltage switch circuit
保护电路切换
protection circuit switch
泵电源电路的运行
pump power circuit operation
厂用电源切换探讨
Switching Exploration of Service Power Source
导电回路电阻
Resistance of contactor circuit