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▲美国重载列车的机车列,可由不同厂家的不同型号、不同功率的机车组成。如一列快速货运列车,由2台SD45R型、1台SDF40-2型和1台C30-7型机车联挂牵引。另一列车由1台SF30C型和3台C30-7型机车联挂牵引。▲联合太平洋铁路重载煤列,由1台C30-7型和3台U30C型机车联挂牵引。▲南太平洋铁路通过内华达山脉的原油列车,由4台EMD SD45T-2型机车牵引。▲圣菲铁路应用1台ALCO CR SD20-
▲ United States heavy train locomotive column, by different manufacturers of different models, different power locomotive composition. For example, an express freight train is towed by two SD45Rs, one SDF40-2 and one C30-7 locomotive. The other train was towed by one SF30C and three C30-7 locomotives. ▲ Joint Pacific Railway heavy coal column, by a C30-7 and 3 units U30C locomotive traction linked. ▲ The South Pacific Railway passes the crude oil train in the Sierra Nevada and is towed by four EMD SD45T-2 locomotives. ▲ Santa Fe Railway Application 1 ALCO CR SD20-