Опубликовано в "Бизнес, Бизнес", язык - English. 10 страниц.
Limestone is a sedimentary rock composed of calcium carbonate, plus calcium and/or magnesium. It is formed when layers of minerals (particularly calcite), fine sediment, and the skeletons and shells of marine organisms undergo lithification. Limestone is one of the most useful and versatile of all industrial minerals. Еще
