The article combines with practical engineering to present the construction process and quality-control essentials of large area concrete wearing-proof floor.

文章结合工程实例，阐述了大面积混凝土金刚砂耐磨地面施工工艺及质量控制要点。

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It has a blast-proof floor, armour-plated glass and was thought to be chemical, biological and nuclear-proof.

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Scraps of lead scattered over the rubbery floor have to be cleared up with explosion-proof vacuum cleaners.

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The very fact that the daughter of an Army officer from Richmond, Virginia -- the very fact that I can represent the president of the United States on the floor of the Senate of the United States is powerful proof that the American dream lives.

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