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60kg/m钢轨试制1978 ;冶金部3钢轨整体加热全长淬火新工艺试验研究1981 ;冶金部3GB2585—81铁路用每米38—50公斤钢轨技术条件1982 ;冶金部3
60kg / m rail trial 1978; Metallurgical Department 3 full heating of the whole rail quenching new technology test 1981; Ministry of Metallurgy 3GB2585-81 rail with 38-50 kilograms per meter rail technical conditions 1982; Department of Metallurgy 3