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Concrete pavement base with reinforcement. This is done by laying down a sub-base, a layer of aggregate material that is placed
Keeping Us in Line: Train Tracks
M.L. Harry Memorial Fountain
Famous dogs
Stone Texture
Railway workers,track maintenance
Railway semaphore
Railway tracks
Dirt Road to Phoenix Downtown, AZ
Earth
The new tarmac road in the poor mountainous areas of northern China
Railway system
excavators digging
Vibrodrilling
WALL
Railway signaling
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