(formerly) = sense 4b; (later) Mining (see quot. 1881).
单词 | θ216481 |
释义 | society > occupation and work > materials > derived or manufactured material > metal > base metal > [noun] (106) base bulliona1593 (formerly) = sense 4b; (later) Mining (see quot. 1881). bullion1605 Base metal; = billon, n. (obsolete). Subcategories:— other than gold or silver (2) — copper (17) — zinc (6) — lead (29) — tin (26) — nickel (2) — chromium (1) — aluminium (5) — mercury (8) — metals of platinum group (6) — antimony (2) |
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