Treatment of materials, and more particularly of minerals and metals, such as in particular metal or plastic coatings, metal treatment of all kinds and all kinds of mechanical, thermo-mechanical or chemical transforming of the properties and characteristics of metals, tempering of metals, surface finishing of metals, brazing, chromium plating, copper plating, brass coating, tin-plating, galvanisation, laminating, wire drawing, twisting, cutting, polishing, magnetisation, plating, stripping finishes, metal welding, recycling of metal products
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