A naturally occurring substance of neither animal nor vegetable origin; an inorganic substance. (Not now in technical use.)
| 单词 | θ209330 | 
| 释义 | society > occupation and work > industry > working with specific materials > working with metal > 			[noun]		 (423)		 mineral?a1425 A naturally occurring substance of neither animal nor vegetable origin; an inorganic substance. (Not now in technical use.) metallurgy1665 The art of working metals, comprising the separation of them from other substances, smelting, and refining; spec. the process of extracting metals… metalworking1855 The art, craft, or industrial activity of working in metal. metallotechny1881 The art of working in metal. Subcategories:— 			product of			(7)		 — 			branches of metallurgy			(7)		 — 			working with iron or smithing			(22)		 — 			working with gold			(3)		 — 			whitesmithing or tinsmithing			(3)		 — 			extraction from ore			(21)		 — 			refining			(31)		 — 			conversion of metals			(20)		 — 			alloying			(7)		 — 			hardening, tempering, or annealing			(44)		 — 			heating			(9)		 — 			founding or casting			(40)		 — 			pressing or drawing			(17)		 — 			rolling			(7)		 — 			underfilling			(2)		 — 			forging or shaping			(18)		 — 			making or application of plates			(1)		 — 			making into faggots			(1)		 — 			welding			(47)		 — 			soldering			(8)		 — 			machining			(8)		 — 			coating with metal			(36)		 — 			protecting metal with coating			(4)		 — 			heating to reduce stress			(3)		 — 			testing			(15)		 — 			colouring metal			(2)		 — 			prolonged artificial ageing of metal			(1)		 — 			other metalworking processes			(21)		 — 			joints			(7)		 — 			other types of metal product			(3)		 — 			specific temperatures in metalworking			(3)		 — 			print showing distribution of sulphur			(1)		  | 
	
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