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单词 up-brow
释义 ˈup-brow Coal-mining.
[up- 2 b + brow n.1 8.]
(See quots.)
1867W. W. Smyth Coal & Coal-mining 135 The bays..will be connected with the main roads by pairs of drifts (up-brows) carried up the rise of the seam; or sometimes..by down-brows.1883Gresley Gloss. Coal-m. 268 Up-brow, an inclined plane worked to the rise.
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