| 单词 | gas drain |
| 释义 | > as lemmasgas drain gas drain n. Coal Mining (now rare) a passage allowing explosive gas to escape from a mine. ΚΠ 1882 Trans. Midland Inst. Mining, Civil & Mech. Engineers 1879–81 7 234 In one case a special gas drain was formed on the rise. 1916 Trans. Inst. Mining Engineers 1915–6 51 596 Mr. James Ryan (a ‘Director of Mines’, who had invented a species of gas-drain). < as lemmas |
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