路基填料土
Filling material in subgrade engineering
轻质填料路基
embankment filled by light materials
路面基层填料
packing material of roadbed
冻土铁路路基
railway embankments in cold regions
风积沙路基填筑
wind-blown sand fill subgrade
高速公路路基工程
freeway subgrade engineering
高速铁路路基
High-speed Railway Subgrade
thigh-speed railway subgrade
fhigh-speed railway subgrade
公路路基工程
Highway subgrade engineering