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词汇 main coal
释义

Definition of main coal in English:

main coal

noun
Coal Mining
  • 1A main or principal seam of coal.

  • 2Coal extracted from a main seam, of recognized good quality.

Origin

Early 18th century. Compare main.

Definition of main coal in US English:

main coal

noun
Coal Mining
  • 1A main or principal seam of coal.

  • 2Coal extracted from a main seam, of recognized good quality.

Origin

Early 18th century. Compare main.

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