… with spirits of turpentine or emulsified in an aqueous medium and frequently containing added colouring matter. … consisting of mixtures of very finely ground sand with sodium carbonate and soap. Scouring pastes are obtained by …
… ores wolframite (iron‑manganese tungstate) and scheelite (calcium tungstate). The ores are converted into the oxide, … is then reduced by hydrogen in an electric furnace or by aluminium or carbon in a high temperature crucible. The …
… Pig iron is defined by Note 1 (a) to this Chapter. However, chromium steels containing more than 2 % of carbon are by … flux or fuel, and sometimes also other elements such as chromium and nickel, added to impart special properties. The …
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