| 单词 | horseback |
| 释义 | horseback [`hȯrs´bak] GEOLOGY A low and sharp ridge of sand, gravel, or rock. MINING ENGINEERING 1. Shale or sandstone occurring in a channel that was cut by flowing water in a coal seam. Also known as cutout; horse; roll; swell; symon fault; washout. 2. To move or raise a heavy piece of machinery or timber by using a pinch bar as a lever. Also known as pinch. |
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