短語詞組短語power transistor switching unit 功率晶體管開關(guān)單元spare power automatic switching 備自投power electronic switching converter 電力電子開關(guān)變換器power and switching 功率和開關(guān)power -switching circuit [電]電源轉(zhuǎn)換電路power electronic switching circuit 電力電子開關(guān)電路Power Electronic Switching Device 電力電子開關(guān)器power source switching controller 電源切換控制器power electronic switching 電力電子開關(guān) 返回 power switching