The state prohibits the damage to farm land for brick-making, and gradually bans the production and use of solid clay brick.

国家禁止毁田烧砖，逐步禁止生产和使用实心粘土砖。

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Others shall control or prohibit the production and use of solid clay brick by stages and groups according to the state plan.

其他地区应当按照国家的规划，分期分批限制或者禁止生产、使用实心粘土砖。

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The porous brick as a substitute of solid clay brick can increase the thermoresistance of walling and enhance the heat-insulating property of building envelope.

多孔砖作为黏土实心砖的替代产品，可以提高砌筑墙体的热阻，加强围护结构的保温性能。

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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