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Бір аула бетонның салмағы қанша

How much does one yard of concrete weigh? It's a question that has puzzled architects for centuries. Өйткені, building something from scratch requires massive amounts of concrete. And yet, as you may know, it takes only about 10 дейін 20 текше фут (or about 28 дейін 36 килограмм) of concrete to build a single apartment or house.
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