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    • Tungsten

      Tungsten, or wolfram, is a chemical element with symbol W and atomic number 74. The name tungsten comes from the former Swedish name for the tungstate mineral scheelite, tung sten or quot;heavy stonequot;. Tungsten is a rare metal found naturally on Earth almost exclusively combined with other elements in chemical compounds rather than alone. It was identified as a new element in 1781 and first

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    • Blockade of Germany (19391945)

      The Blockade of Germany (19391945), also known as the Economic War, was carried out during World War II by the United Kingdom and France in order to restrict the supplies of minerals, metals, food and textiles needed by Nazi Germany and later Fascist Italy in order to sustain their war efforts. The economic war consisted mainly of a naval blockade, which formed part of the wider

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      Stone Dressing Machine, Stone Dressing Machine Suppliers and Chinese supplier stone dressing machine

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      fluorite grinding machineimsr. Fluorite crusher andsemi self grinding machine for manganese ore in senegal semi self grinding machine for dolomite in bangladesh semi self grinding machine

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    • Spilpunt Congo (Kinshasa)

      Key Minerals The Copperbelt area (estimated to contain 55.5m tonnes of copper and 3.6m tonnes of cobalt), which runs through Katanga contains 34% of the worlds cobalt resources and 10% of the worlds copper resources, and during the 1960s and 1970s the DRC was the worlds leading producer of these metals. Copper concessions were formerly managed by G233;n233;rale des Carriers et

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    • Numerical NAICS Code List 2017 Class Codes

      This page contains a numerical NAICS code list 2017. Users can view and lookup an index of 2017 NAICS codes in numerical order.

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