dross skimming

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skimming — /skim ing/, n. 1. Usually, skimmings. something that is removed by skimming. 2. skimmings, Metall. dross. 3. Slang. the practice of concealing gambling or other profits so as to avoid paying taxes, commissions, etc. [1400 50; late ME skemmyng.… … Universalium
skim — /skim/, v., skimmed, skimming, n. v.t. 1. to take up or remove (floating matter) from the surface of a liquid, as with a spoon or ladle: to skim the cream from milk. 2. to clear (liquid) thus: to skim milk. 3. to move or glide lightly over or… … Universalium
lead processing — Introduction preparation of the ore for use in various products. Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… … Universalium

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