“subgrade ontology”的概念、定义、翻译、参考文献-科学参考

单词	subgrade ontology
释义	subgrade ontology Encyclopedia 工学铁路路基工程释 subgrade ontology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。
随便看	satellite navigation frequency satellite navigation industry satellite navigation integrity satellite navigation interoperability satellite navigation message satellite navigation receiver satellite navigation signal satellite navigation signal modulation satellite navigation signal simulator satellite navigation software receiver satellite navigation system satellite navigation system coding satellite navigation time system satellite nebula satellite network Satellite news gathering satellite news gathering equipment satellite of Jupiter satellite of Mars satellite of Neptune satellite of Pluto satellite of Saturn satellite of Uranus satellite operating density satellite operating period

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