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![Concrete - Wikipedia, the free encyclopedia]()
en.wikipedia.orgThe concrete solidifies and hardens to rock-hard strength through a chemical ... Very low-strength (2000 psi or less) concrete may be used when the concrete ...瀏覽：956
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日期：2024-07-26
The concrete solidifies and hardens to rock-hard strength through a chemical ... Very low-strength (2000 psi or less) concrete may be used when the concrete ......
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