单词	tinstone
释义	tinstone /ˈtɪnstəʊn / noun Another term for cassiterite.The younger granites form rugged hills of Jurassic age, and contain tinstone and columbite.... The procedures needed to separate the tinstone from the other minerals are demanding. Furthermore, the addition of the tinstone reduced the temperature required to melt the metal and, once melted, the bronze was more fluid and easier to cast.
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