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。
2
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。
3
DIN5510-2: preventive fire protect in railway vehicle parts 2: fire behaviour and fireside effects of material and parts-Classification, requirements and test methods.