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单词
parabituminous coal
释义
parabituminous coal
[¦par·ǝ·bǝ`tüm·ǝ·nǝs `kōl]
GEOLOGY
Bituminous coal that contains 84-87% carbon, analyzed on a dry, ash-free basis.
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更新时间:2024/12/25 13:54:59