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2026-01-14

“durain”的英文意思

单词 durain
释义 durain|ˈdjʊəreɪn|
[f. L. dūrus hard + -ain as in fusain (sense 2).]
A type of hard, compact coal forming a dull layer in a bituminous seam.
1919[see clarain].1930Engineering 18 July 92/1 Vitrain and durain belonged to the former [coking coal] and fusain to the latter [non-coking coal] class.1950Wilson & Wells Coal, Coke, & Coal Chemicals iii. 59 Exact correlation of the Bureau of Mines and the British terminologies, particularly the clarain and the durain of the latter, is not possible on account of the different bases for the classification.1961W. Francis Coal (ed. 2) vi. 312 Generally American coals appear to contain much less durain than British coals.
“durain”的英文意思

　

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