路基

路基
lùjī
(1) [bed; roadbed; subgrade of highway]
(2) 铁路和公路的基础
(3) 支承铁路道碴及钢轨的表面土方工程
(4) [substructure]∶支承铁道线路和道碴的土质基础

Advanced Chinese dictionary. 2013.

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