5、 对铁路等级的理解 铁路等级（railway classification）是区分某条铁路在国家铁路网中的 6 作用、意义和远期客货运量大小的标志。是确定铁路技术标准和设备类型 的依据。
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In the new classification standard of soil adopted by the Railway Ministry, fine particle soils are classified by plastic index diagram instead of plastic index simply.
在铁道部新的土分类标准中，细粒土由按单纯的塑性指数分类改为按塑性图分类。
The concepts of railway running safety and running accidents, as well as the meaning of accidents classification and hidden trouble prevention are expounded.
阐述了铁路行车安全和行车事故的概念，以及进行事故分类防止隐患的意义。
DIN5510-2: preventive fire protect in railway vehicle parts 2: fire behaviour and fireside effects of material and parts-Classification, requirements and test methods.
DIN5510 - 2：铁路车辆防止燃烧-第2部分：材料和构件的燃烧特性和燃烧并发现象-分类、要求和测试方法。
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