| 单词 | water-level |
| 释义 | > as lemmaswater-level 7. Mining. (a) A nearly horizontal ‘drift’, passage, or gallery in a mine. (b) A ‘drift’; often (more fully water-level) one serving for drainage purposes; also see quot. 1860. For blind-level n., dip-head level, drowned level, etc., see the first member. ΘΚΠ society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > passage > horizontal > types of level1721 roadway1832 side drift1837 narrow1850 entry1854 rise heading1872 cross-head1877 sump drift1880 gopher-drift1881 stone-heading1892 1721 in Public Rec. Colony of Connecticut (1872) VI. 253 Any disagreement that may happen..amongst..lessees..concern'd in the mines aforesaid, about making any levels (or clearing and cleansing the said levels or shafts). 1805 R. Forsyth Beauties Scotl. I. 270 This gentleman opened a level or mine from the sea,..it drained the upper coal-works. 1827 T. Jarman Powell's Ess. Learning of Devises (ed. 3) II. 137 The leaseholds had mostly been demised as ‘coal-mines and levels at rents’. 1849 G. C. Greenwell Gloss. Terms Coal Trade Northumberland & Durham 35 Level, a drain cut in the bottom stone, to set away or convey water. A pair of levels are a pair of drifts, driven in the water-level direction of the coal, for the purpose of winning coal. 1860 Eng. & Foreign Mining Gloss. (new ed.) (Newcastle Terms) 58 Levels, gutters for the water to run in. 1867 W. W. Smyth Treat. Coal & Coal-mining 129 When the coal to be cut away is a short block, as in the driving of levels. < as lemmas |
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