- pyrolytic manganese dioxide
- пиролитический диоксид марганца
Солнечная энергия. - М.: «Руссо».. под ред. Д.С. Стребкова. 2005.
Солнечная энергия. - М.: «Руссо».. под ред. Д.С. Стребкова. 2005.
Tungsten — (pronEng|ˈtʌŋstən), also known as wolfram (IPA|/ˈwʊlfrəm/), is a chemical element that has the symbol W and atomic number 74.A steel gray metal, tungsten is found in several ores, including wolframite and scheelite. It is remarkable for its… … Wikipedia