people jiangsu yuanfang electric technology co., ltd. 1 lanzhou nanzi electric co., ltd., lanzhou nanzi, lanzhou electric, lanzhou distribution cabinet, lanzhou high and low voltage complete set, lanzhou high and low voltage electrical network, lanzhou box transformer, lanzhou distribution box, lanzhou substation comprehensive automation, gansu electric, gansu distribution cabinet, gansu high and low voltage complete set, gansu high and low voltage electrical network, gansu box transformer, gansu distribution box 30 strip