무거운 석재나 콘크리트 블록을 들어 올리기 위해 사용하는 강철 장치로, 세 개의 부품이 제비꼬리 모양의 구멍에 끼워져 고정되는 방식이다.
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.
예문:
"The mason carefully inserted the lewis into the pre-cut hole in the granite block."
"Using a lewis allows for the lifting of heavy stones without the need for slings around the exterior."
"Ensure the middle piece of the lewis is securely locked before hoisting the concrete slab."