1.used in coal mine well for wiring branch connection 2.can be serve as driving force ,lighting ,signals ApplicationBHD20-400 ... Diamaterof Inlet WireDemension(m)BHD20-400 1140,660,380 400 2/3/4 Ø78660*250*220 660*460*220 660* ... 660*220BHD20-200 1140,660,380 200 2/3/4main cableØ64,branch cableØ39470*240*170 ... 470*360*170 470*360*170BHD20-100 660,380 100 2/3/4 Ø39380*290*150 BHD20-40 660,380 ...