英文字典中文字典51ZiDian.com
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bournonite 车轮矿 车轮矿 Bournonite \Bour"non*ite\, n. [Named after Count Bournon, a
mineralogist.] (Min.) A mineral of a steel-gray to black color and metallic luster, occurring crystallized, often in twin crystals shaped like cogwheels (wheel ore), also massive. It is a sulphide of antimony, lead, and copper. [1913 Webster]
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