最終更新日：2024/08/03
(historical) A signal made by burning lights of different colours, used by vessels at sea, and in the life-saving service.
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Coston light
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(historical) A signal made by burning lights of different colours, used by vessels at sea, and in the life-saving service.
Coston light
DiQt（ディクト）
無料
★★★★★★★★★★
