untopping

名词 n. 动词 v.

英文释义

名词 n.
  1. Removal of overburden from an old mine to allow continued economic operation. uncountable
    — J.E. Greave's diaries tell us he took this suggestion on board, and on 4 September 1894 he and his brother R.M Greaves began discussing the "untopping" of a large area at Llechwedd.
动词 v.
  1. present participle and gerund of untop form-of,gerund,participle,present
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