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单词
semianthracite
释义
semianthracite
semianthracite
[
‚sem·ē′an·thrə‚sīt
]
(geology)
Coal which is between bituminous coal and anthracite in metamorphic rank, and which has a fixed-carbon content of 86-92%.
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更新时间:2025/6/1 19:44:10