| 单词 |
under-level |
| 释义 |
ˈunder-ˌlevel [under-2.] (See quots.)
1852Eng. & Foreign Mining Terms (1860) 66 Underlevel drift, a drift driven from the pumping-pit to un-water dip workings. 1883Gresley Gloss. Coal-m. 267 Under-level, winning the ironstone by driving drifts into the hill-sides, &c., instead of sinking shafts. |

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