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金属矿床
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金属矿床
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理学
金属矿床
释
metallic ore deposit
金属矿床
可提取一种和几种金属元素单质或化合物的矿床。钢铁工业、有色金属等原材料工业的物质基础。中国已发现59种金属元素的各类金属矿床。
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city plan of Binhai New Area
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city site of Hun in Mongolia
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