| 单词 | pipe ore |
| 释义 | > as lemmaspipe ore ΘΚΠ the world > the earth > minerals > ore > [noun] > metal ore > iron ore > specific shape ball-mine1702 pipe ore1709 ball veina1728 kidney ore1750 1709 T. Robinson Ess. Nat. Hist. Westmorland & Cumberland xiv. 80 When the Vein opens wide in some place, and again closeth, or as the Miners speak, Twitcheth at both Ends, this is called a Belly of Ore, or Pipe-Ore. 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 163 Pipe-ore, iron ore (limonite) in vertical pillars, sometimes of conical, sometimes of hour-glass form. 1884 Science 4 July 25/1 The pipe ores occur usually higher in the limestone... These ores occur in situ between parallel walls of limestone, in plate-like masses, scales, or as cylindrical pipes. < as lemmas |
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