| 摘 要： | THE Jiayang steam train has been running for almost half a century in Qianwei County, Leshan City, Sichuan Province. It was in 1958 that the Jiayang Coal Mine (predecessor to the Sichuan Jiayang Group) built the Ba-Shi (Bajiao Valley-Shibanxi) Railway - a total length of 19.84 kilometers - and bought trains from the Shijiazhuang Steam Locomotive Factory in Hebei Province to solve the problem of coal transportation. It opened on July 12,1959. The trains were known as "inch gauge" because their gauge is only 76.2 centi-
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