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</html><description>Wolfraam is het 74e chemische element op het periodiek systeem en het zwaarste metaal. Het wordt van nature in de bodem aangetroffen, in twee soorten mineralen, Scheeliet en Wolframiet genaamd, in een verhouding van 1,38 ppm. De unieke eigenschappen maken dit metallo&#xEF;de zeer bruikbaar in de technologische industrie. Ken dan alle details van dit metaal. ... Lees verder</description></oembed>
