• 墙上显然缺乏水泥正象某些罗马墙壁,对建筑物本身的坚固朴实却丝毫无损

    Cement was lacking, of course, but, as in the case of certain Roman walls, without interfering with its rigid architecture.

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  • 本文通过研究罗马尼亚s_2油井水泥高温下形成水泥强度衰退规律,提出合理讨论了应加砂的温度范围。

    This paper proposed the reasonable amount and the temperature of adding silica flour after studying the strength retrogression of Romania S_2 oil cement at high temperature.

    youdao

  • 作者Courland罗马帝国掌握了水泥制造,并且在当时建筑文化砌体结构保持了2000多年

    The Roman Empire mastered cement making, and some of that culture's masonry Bridges still stand 2,000 years later, author Courland said.

    youdao

  • 罗马人已经发现火山灰制作水泥质量更好

    The ancient Romans discovered that volcanic ash made better cement.

    youdao

  • 罗马人已经发现火山灰制作水泥质量更好

    The ancient Romans discovered that volcanic ash made better cement.

    youdao

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