| 21. | Most cuttings are in earth or rock, but some have concrete lining or stone pitching in parts.
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| 22. | To avoid such issues, the National Rail Administration chose to instead build the tunnel with concrete lining.
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| 23. | These buildings have walls 2 feet 3?inches thick and floors of concrete lined with timber flooring.
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| 24. | The somewhat haphazardly constructed channel is described as being either concrete lined, " composite ", trapezoidal, or riprap.
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| 25. | Langdon might describe today's suburbs as endless corridors of concrete lined with parking lots and gaudy-looking, colorless buildings.
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| 26. | Large chunks of concrete lining fell from the ceiling and walls of the tunnel, further complicating rescue efforts.
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| 27. | One of the longest concrete lined canals in the world, it has changed the desert's face around Ganganagar.
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| 28. | Permanent supports have been provided by a concrete lining of varying thickness depending upon the stability of the ground.
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| 29. | Along much of its length the creek is a combination of covered channel and an uncovered concrete lined trench.
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| 30. | The tunnel was blasted through Limestone, Dolimitic Conglomerate and Keuper Marl and lined with a 375mm thick concrete lining.
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