但是，从新中国成立到蒸汽机车到中华大地的正规运输线上退役的近半个世纪的岁月里，蒸汽机车为新中国的经济建设做出了卓越的贡献，也给中国人民留下了深深的怀念。
O O O O B-Organization I-Organization I-Organization O O O B-Thing I-Thing I-Thing I-Thing O B-Location I-Location I-Location I-Location O O O O O O O O O O B-Metric I-Metric I-Metric I-Metric I-Metric B-Time I-Time I-Time O O B-Thing I-Thing I-Thing I-Thing O B-Organization I-Organization I-Organization O O O O O O O O O O O O O O O O B-Location I-Location B-Person I-Person O O O O O O O O O