A control method and its feature of automatic circuit close device for 330 kV backup power at Xining transformer substation are introduced,and its control part has been designed by using high reliable programmable logic controller (PLC).是什么意思_A control method and its feature of automatic circuit close device for 330 kV backup power at Xining transformer substation are introduced,and its control part has been designed by using high reliable programmable logic controller (PLC).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句