theonlyjordyn theonlyjordyn

20-04-2018
Computers and Technology

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How are bridges built underwater?

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Аноним Аноним

20-04-2018

builders dig a trench in the riverbed or ocean floor. They then sink pre-made steel or concrete tubes in the trench. After the tubes are covered with a thick layer of rock, workers connect the sections of tubes and pump out any remaining water.

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