单词 up-brow 释义 up-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.188...