| 单词 | 燕尾形 |
| 释义 | 〔lewis〕A dovetailed iron tenon made of several parts and designed to fit into a dovetail mortise in a large stone so that it can be lifted by a hoisting apparatus. Also called lewisson 起重爪，吊楔：燕尾形铁榫，由几部分构成，可以拼拢嵌进一块巨石上的燕尾形榫眼，由此可通过一个起吊装置举起大石 也作 lewisson |
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