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单词
semibituminous coal
释义
semibituminous coal
semibituminous coal
[
¦sem·i·bə′tü·mə·nəs ′kōl
]
(geology)
Coal that is harder and more brittle than bituminous coal, has a high fuel ratio, contains 10-20% volatile matter, and burns without smoke; ranks between bituminous and semianthracite coals.
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更新时间:2025/6/24 15:24:08