国产精品一区第二页尤自在拍_精品国产第一国产综合_日本大香线蕉线伊人久久 ,免费看一级一级人妻片,免费看毛片网站,熟妇女人妻丰满少妇中文字幕,在线无码观看

GCK Low-voltage switchgear   Low-voltage switchgear 

It is suitable for three-phase four-wire and three-phase five-wire power systems with three-phase AC 50, (60) Hz, rated working voltage and rated insulation voltage of 380 (400) V, 660 V and rated current of 6300 A and below, and is widely used in power plants, substations, industrial and mining enterprises, buildings and hotels, airports, terminals and communication centres such as radio and television, as power generation, power transmission and distribution, electrical energy conversion and power distribution of electrical energy consumption. It is used as a PC and motor control centre MCC in power generation, transmission and distribution, power conversion and power consumption.