上游型蒸汽机车是上世纪70年代至90年代杭钢铁路运输的主力机车，为钢铁生产的运输作出了巨大贡献。
SY steam locomotive is the breadwinner of HISGC in the railway transportation between the1970s and90s , which has made great contribution to the transportation for the steel and iron production .
上游型蒸汽机车