freight train locomotive 运货机车 freight train performance 货物列车运行性能 freight train performance chart 货物列车运行性能图 .
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On the many cases of active braking in the front of freight train, this paper analyzed the reason from the aspect of locomotive and vehicle brake, at the end, the prevention measurements were given.
根据货物列车前部多发生自然制动的情况，从机车车辆制动方面作了原因分析，从而制定出预防措施。
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