| 单词 | room-and-pillar |
| 释义 | room-and-pillar[ room-uhn-pil-er, room- ] / ˈrum ənˈpɪl ər, ˈrʊm- / adjective Mining.noting a means of extracting coal or other minerals from underground deposits by first cutting out rooms, then robbing the pillars between them; pillar-and-breast. Compare longwall. Words nearby room-and-pillarrookery, rookie, rooky, room, room and board, room-and-pillar, room clerk, room divider, roomer, roomette, room father Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 |
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