Tungsten is used while processing the steel. [Please select]
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Deposits of copper, tin, iron and tungsten have been discovered, and a variety of other mineral products (graphite, mica, spodumene, coal, petroleum, &c.). [Please select]
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Chromium and manganese are often used in combination with tungsten when high-speed cutting tools are made. [Please select]
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Later (1905) came the metalized carbon filament and finally the employment of tantalum or tungsten. [Please select]
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The tungsten lamps first made were very delicate, and it was not until W. [Please select]
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Coolidge, in the research laboratories of the General Electric Company at Schenectady, invented a process for producing ductile tungsten that they became available for general use. [Please select]
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