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继40马力单轨吊扑机车之后,河北省煤研所设计的20马力柴油机单轨吊挂机车于1983年10月中旬由湖南长沙矿山通用机
Following the 40-horsepower monorail Zhaopu locomotives, Coal Research Institute of Hebei Province, 20 horsepower diesel engine monorail locomotives in mid-October 1983 by the mining machine in Changsha, Hunan General Machine