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Concrete sewer or drainage collector filled with water, in which a round plastic pipe is connected.
Múzquiz, Mexico, January 17 -- The deep entrance of a coal mine with some miners in the Múzquiz region in the state of Coahuila in northern Mexico, about 100 kilometers from the border between Mexico and the United States.
Communication tunnel at underground bunker or subway, etc.
Long steps towards mine tunnel
Long concrete pedestrian corridor under the train station with the staircase and the orange validation machine next to it. No one inside
[url=http://www.istockphoto.com/search/lightbox/11116736#18bbc827/]\n[IMG]http://i1297.photobucket.com/albums/ag30/001abacus/tunnel.jpg[/IMG]\n[/url]
The entrance of the parking lot is illuminated on the concrete wall
Underground mine. Underground railway for transporting ore. Mine trolley as part of an underground freight train.
WATER INSTALATIONS
Entrance to the Metro station in Hamburg - Stock Photo
Underground tunnel and subway rails. Transport pipeline by Tunnel Boring Machine for electric train subway.
Futuristic tunnel architecture on the London underground
Industry and technology
Francisco Sá Carneiro Airport connection Subway interior corridor, Porto, Portugal.
Tunnel with lamps. Long tunnel in building. Subway.
Old, broken, and empty industrial space with high ceilings, exposed beams, and scattered debris.
construction metro line B Rennes
A sunny day in the residential neighbourhood area of Breisach - a small town in Germany
Long concrete pedestrian corridor under the train station with the staircase. No one inside
Cable tunnel
Dark dirty abandoned subway tunnel with rusty railway.
Mine/tunnel entrance at night
a subsurface route or underpass in road traffic and transportation
Coal mine underground corridor with support system
Focus stacked image inside a concrete box culvert under a road for stormwater drainage. . High quality photo
Dramatic view looking up an elevator shaft, showcasing the intricate mechanisms and railings that guide the elevator.
Postojna, Slovenia - September 5, 2015: Unrecognized people travel by entertainment train in Postojna Cave.
Inside the pipes of a chemical plant under construction
Eurotunnel train, France, UK - July 19, 2018: Blue car on board of Eurotunnel train connecting the UK and France. A journey to cross the English channel takes only 35 minutes.
underpass for the station
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