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black lignite
释义
black lignite
black lignite
[
′blak ′lig‚nīt
]
(geology)
A lignite with a fixed carbon content of 35-60% and a total carbon content of 73.6-76.2% that contains between 6300 and 8300 Btu per pound; higher in rank than brown lignite. Also known as lignite A.
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更新时间:2026/7/31 20:15:48