The glass block is made of quartz sand, limestone and other natural ores, combined with some soda, borax and other chemical raw materials. Glass block is the main raw material for producing glass wool. Glass wool is a kind of artificial inorganic …
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Кристаллы талька. Тальк (тетрасиликат магния состава ()) — минерал из класса силикатов, подкласса слоистых силикатов.Кристаллическое вещество, представляющее собой жирный на ощупь рассыпчатый порошок белого ...