| 单词 | gravity-wedge |
| 释义 | > as lemmasgravity-wedge gravity-wedge n. a wedge that falls into position, when released, by the force of gravity alone. ΚΠ 1888 Pall Mall Gaz. 23 Oct. 2/2 A very simple but effective gravity-wedge safety apparatus. < as lemmas |
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