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单词 bituminous coal
释义

bituminous coal

noun [mass noun]
Black coal having a relatively high volatile content and burning with a characteristically bright smoky flame.Only in this region do the reserves of anthracite and bituminous coal exceed the reserves of sub-bituminous coal and lignite....
  • The Tertiary coal of northern Thailand is classified according to coal rank as lignite to bituminous coal.
  • This is largely due to a combination of factors including our weather, the eradication of smoky bituminous coal in many urban areas during the 1980s and the early 1990s and the introduction of unleaded petrol.
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更新时间:2024/9/21 11:02:26