lewis
/ˈljuːɪs/noun
- a steel device for gripping heavy blocks of stone or concrete for lifting, consisting of three pieces arranged to form a dovetail, the outside pieces being fixed in a dovetail mortise by the insertion of the middle piece吊楔, 起重爪, 抓斗。
词源
late Middle English: probably from Old French lous, plural of lou(p) 'wolf'， the name of a kind of siege engine.