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。
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.
对装用104型客车分配阀且带电子防滑器的个别车辆在运行过程中发生的自然制动现象进行了调查与分析，并提出了相应的建议。
The investigation and analysis are made on the natural braking in operation of very few cars with 104 type passenger car distribution valves and with electronic WSPs.
由于青藏铁路特殊的自然地理环境和线路条件，为保证列车安全运行，对列车制动系统必须有更高的要求。
Due to the special natural and geographical environment and line conditions, some stricter requirements for the train braking system are needed to ensure the safe train operation.
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