大孔混凝土
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sand-free Coarse Porous Concrete 无砂大孔
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Both of the coarse and fine light-weight aggregates in the concrete were natural calcium carbonate nucleations with loose and porous structure.
“混凝土”中的轻质粗、细集料是一种组织疏松、多孔的天然碳酸钙结核。
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