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16米精轧螺旋粗钢筋先张法预应力混凝土铁路桥梁及其制造工艺技术鉴定会,于1982年12月下旬在北京铁道兵6012厂召开。以粗钢筋为主筋的先张梁,是铁道部在1981年决
16 meters finishing spiral pre-tensioned prestressed concrete railway bridge and its manufacturing technology appraisal meeting, in late December 1982 in Beijing Railway Corps 6012 plant was held. The first girder with the main reinforcement of the crude steel bars was decided by the Ministry of Railways in 1981