公路标志标线
highway signs and markings
冻土铁路路基
railway embankments in cold regions
高速铁路路基
thigh-speed railway subgrade
fhigh-speed railway subgrade
High-speed Railway Subgrade
公路铁路两用桥
road rail bridge
rail-cum-road bridge
highway and railway bi-purpose bridge
公路－铁路两用桥
bi-purposed bridge for highway and railway
铁路路堤填料
filling material for railway embankment
铁路路基
railway foundation
Railway sub-grade
railway subgrade
railroad subgrade
permafrost
railway roadbed
Railway bed
railway subgrade compaction
railroad bed
subgrade
railway formation
Railway embankment