They are a dual voltage version -LRB- 1500 V DC and 25 kV 50 Hz AC -RRB- of the BB 7200 and BB 15000 classes .
They are a polycurrent version -LRB- 1500 CV direct current and 25 kV 50 Hz AC -RRB- of the BB 7200 and BB 15000 classes , with which it shares the exterior appearance .
They are a polycurrent version -LRB- 1500 CV direct current and 25 kV 50 Hz AC -RRB- of the BB 7200 and BB 15000 classes , with which it shares the exterior appearance .
단순화: They are a dual voltage version -LRB- 1500 V DC and 25 kV 50 Hz AC -RRB- of the BB 7200 and BB 15000 classes . 산출: