That brick dust at the door, how does it work?

我看到门口的砖屑那有什么讲究吗？

youdao

Effect of using ceramic polishing brick dust as one of admixture on cement properties;

实验研究了瓷质抛光砖坯体中石英晶相对防污性能的影响。

youdao

The effect of applying polishing brick dust as one of cement admixture on cement properties was studied.

研究了陶瓷抛光砖粉作水泥混合材对水泥相关性能的影响。

youdao

In the foot-well and the wheel arches, scientists found traces of a distinctive mix of chalk, brick dust and concrete used to cover the road leading to the ditch.

BBC: Holly Wells and Jessica Chapman

There is no hint of brick-dust whatsoever beneath Ash's well-shaped finger nails.

ECONOMIST: New verse