These can have a porous structure with a large internal surface area.

超细粉体也是个好例子,这些材料具有内表面积很大的多孔结构.

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One gram of zeolite has an internal surface of about 500 square meters.

一克沸石具有大约500平方米的内部表面.

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The smoothness of the new internal surface increases the velocity and thereby compensates the reduced cross - section.

新管光滑的表面增加水的流速,故可弥补管断面积减少的缺点.

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Sandblast internal surface of restoration for 1 - 2 seconds. Rinse with water and air dry.

在修复体内表面喷砂1-2秒钟. 用清水冲洗,吹干.

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