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单词 bottom coal
释义

Definition of bottom coal in English:

bottom coal

noun
  • (A name for) the lowest deposit or stratum of coal in a coalfield; (also) coal in or from the lowest workings of a mine or the lowest part of a seam.

Origin

Mid 17th century; earliest use found in Dud Dudley (?1600–1684), ironmaster.

 
 

Definition of bottom coal in US English:

bottom coal

noun
  • (A name for) the lowest deposit or stratum of coal in a coalfield; (also) coal in or from the lowest workings of a mine or the lowest part of a seam.

Origin

Mid 17th century; earliest use found in Dud Dudley (?1600–1684), ironmaster.

 
 
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更新时间:2024/11/13 10:51:24