Mining. The action or process of mixing gold- or opal-bearing material, etc., with water in a container, in order to separate out the precious…
| 单词 | θ210345 |
| 释义 | society > occupation and work > industry > mining > [noun] > excavating or dressing ore > dressing ore (13) puddlingc1585 Mining. The action or process of mixing gold- or opal-bearing material, etc., with water in a container, in order to separate out the precious… vanning1671 The action or process of separating ore on a shovel. Also attributive, as vanning-action, vanning shovel. jigging1778 In technical senses: see jig, v. 5–9. ore-dressing1837 mineral dressing1931 treatment of ore so as to remove gangue and concentrate the valuable constituents (cf. ore-dressing n. adj. at ore, n.2 compounds 2a). Subcategories:— specific methods or minerals (8) |
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