| 单词 | rib wall |
| 释义 | > as lemmasrib wall rib wall n. Mining a rib (sense 13c) forming the side wall of a working. ΚΠ 1839 A. Ure Dict. Arts 981 The upper coals are then begun to be worked, next the rib-wall. 1920 Colorado School Mines Mag. Apr. 61/2 The longer section is inserted parallel to the ‘rib’ wall. 2007 Jrnl. Loss Prevention Process Industries 20 608/2 Each llem[= Lake Lynn Experimental Mine] drift has 10 data-gathering..stations inset in the rib wall. < as lemmas |
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