欧美日韩免费一区中文_亚洲第一区欧美国产不卡综合_综 ,狠狠夜夜躁噜精品_国产精品无码专区第_美女日逼软件_ ,亚洲春色AV无码专区在线播放,欧美黑人又大又粗xxx

XGN15-12 AC metal-enclosed ring network switchgear   Medium-voltage switchgear 

The product is a metal-enclosed switchgear with sulphur hexafluoride load switch as the main switch. It is applicable to the three-phase AC rated voltage of 12kV and rated frequency of 50Hz power system ring network power supply and the indoor complete power distribution device of the terminal power supply system. It is mainly used in factories and mines, residential communities, high-rise buildings, schools and other power distribution places for receiving and distributing electrical energy.