DO YOU KNOW HOW CEMENT IS MADE?

Cement is mainly composed of minerals such as clay, limestone, and gypsum. It is an important building material. The cement production process is relatively complicated. By adding other materials to adjust its chemical composition, such as sandstone, iron ore, bauxite, etc. in the raw materials, it can effectively strengthen the building and

Цирконий — это искусственный кристаллический синтетический материал, а циркон — это натуральный орнамент. Это два совершенно разных вещества. Цирконий — оксид циркония, синтетический �