Mepụta nsụgharị dị mgbagwoju anya nke ahịrịokwu a All DDA40X nkeji gụnyere ọhụrụ ibu ule circuit.
N'ezie, nsụgharị dị mgbagwoju anya nke ahịrịokwu ahụ bụ "All DDA40X units included a new load test circuit, allowing units to load test without a track-side load test box. "