impervious material

The washbasin shall be made of easy-to-clean and impervious material.

洗手台内外应使用易清洗不透水材料构筑。

There are many defects when GCLs are used in landfill as impervious material alone. So the specification recommends that a certain thickness of clay should been used as protective layer for GCLs/ GM to make up its shortcomings.

将GCLs单独应用于垃圾填埋场防渗工程中时存在着诸多缺陷，故规范中要求采用一定厚度的粘土作为GCLs/GM防渗衬垫的保护层，以弥补其不足。

This material is impervious to gases and liquids.

气体和液体都透不过这种物质.

It could not pass through material impervious to water such as mica.

它不能通过云母这样的不透水的物质.

Qualified dam core impervious material is produced by controlling four key procedures during material mixing.

大坝心墙防渗掺合料的生产质量是狮泉河水电站大坝质量控制的关键.