Solid clay brick still prevails in the load-bearing wall materials in China.

在中国的承重墙体材料中，实心粘土砖仍占据主要地位。

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In order to solve the problem, clay brick is forbidden to employ in the cities.

为了解决这个问题，我国一些城市已经禁止使用粘土实心砖。

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China has still a large number of residential construction using sintered clay brick.

中国仍然有大量的住宅建筑使用烧结粘土砖。

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They have also supported related areas of labor, contracting out clay mining in the surrounding area, hauling and trucking 10-20 loads of clay and brick per day, and bringing in contractors for large maintenance projects.

WHITEHOUSE: Laying the Foundation for Economic Success, Brick by Brick

The loose surface and different clay characteristics meant the crushed-brick surface required a different game plan, he said.

CNN: Tennis interactive: Why clay is so different

The crushed-brick mixture that constitutes the base of a clay court produces a the highest bounce and most friction of the three surfaces, meaning they have the lowest CPR of all three surface types and are considered as the "slowest".

CNN: Tennis interactive: Why clay is so different