BVR鑰匙箱

yaochixiangkaiguanshiyufanggongzuorenyuanshoudaodianlijichegaoyadianqinhaiershejideanquanzhuangzhi。dangjichegaoyagongdiangongzuoshi，jicheneigexianggaoyadianqiguiguimenchuyubihezhuangtai，wufakaiqi
；當高壓電器櫃櫃門開啟，工作人員維護高壓電器櫃時，電力機車高壓係統無法閉合。