英语释义
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n. A system of working in ore, etc., when it lies not in
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strata or veins, but in solid masses, so as to be worked in chambers or
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n. A metalliferous deposit characterized by the
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impregnation of the mass of rock with many small veins or nests
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irregularly grouped. This kind of deposit is especially common with tin
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ore. Such deposits are worked in floors or stories.