单词 | longwall |
释义 | longwall[ lawng-wawl, long- ] / ˈlɔŋˌwɔl, ˈlɒŋ- / adjective Mining.noting or pertaining to a means of extracting coal or other minerals in an underground mine from a continuous face, the roof before the face being supported at intervals by temporary or movable artificial supports.Compare room-and-pillar. nounthe continuous face so worked. Origin of longwallFirst recorded in 1830–40; long1 + wall Words nearby longwalllong underwear, Longus, long vacation, Longview, long-waisted, longwall, long wave, longways, long weekend, long white lop-eared, long-winded Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for longwall
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