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路基本体
包括用天然土、石所填筑的基床表层、基床底层和基床以下路堤,以及在天然地层中挖出的路堑或经换填基床处理的路堑,直接支撑轨道,承受列车荷载。路基本体根据地质条件和填筑材料的不同,又可分为路堤、路堑、半路堤、半路堑、半堤半堑、不填不挖路基。
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material hoist
material host response
material immune response
material implication
material inflammatory reaction
material intrinsic length
material irritation
materialism
Materialism and Empirio-criticism
materialism of the old type
materialist conception of history
materialistic criminal psychology
materialistic education
Materiality
materiality
materialization
materialized query table
material law
material level measurement
Material Library
material,light reflection model,and light scattering model
material management system
material measure
material metabolism analysis
material misstatement
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