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大连机车车辆工厂1985年试制成功的东风_4B型高原机车,于1986年3月在乌鲁木齐铁路局的南疆铁路上顺利通过了高原线路牵引试验。试验结果表明,机车性能基本达到预期要求:可以满足南疆线运行的需要。这次试验是由乌鲁木齐铁路局主持的,铁道部工业总局、机务局、大连内燃机车研究所和大连机车车辆工厂参加了试验。
Dalian Locomotive and Rolling Stock Plant successfully piloted Dongfeng-4B type plateau locomotive in 1985 and successfully passed the plateau traction test in March 1986 on the southern Xinjiang Railway of Urumqi Railway Bureau. The test results show that the locomotive performance has basically met the expected requirements: it can meet the needs of the operation of the southern Xinjiang line. The trial was hosted by the Urumqi Railway Bureau. The Ministry of Railways Administration of Industry, the Bureau of Machine Building, the Dalian Diesel Locomotive Research Institute and the Dalian Locomotive and Rolling Stock Factory participated in the trial.