Engineer Rob Bell examines the design and construction challenges faced in building a true engineering marvel, rock lighthouses - lighthouses built on treacherous rocks and reefs out at sea that were a hazard to shipping. 本灯塔爱好者没有字幕硬上了…// to raise the light in the darkness 呜呜呜。⚓️和灯塔我的爱。啥时候辞职了就去那个开放的灯塔呆一个礼拜叭
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