Del cemento al puente (From Cement to Bridge)
From the Series De principio a fin (Start to Finish)
How is a bridge built? Cement is mixed with water and rocks to make concrete. The concrete is poured into holes and into blocks that are stacked to make a bridge. Once fences and lights are added to the bridge, cars can drive across it.
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978-0-8225-7202-2
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$26.99 |