Clipped from:https://www.forbes.com/sites/geoffreymorrison/2…
Transporting goods by boat has been the backbone of the world’s economy for centuries. Massive cargo ships are unloaded by skilled dockworkers using skyscraper-sized cranes.
But how did ships disgorge their goods in the days before steel girders and hydropneumatics? The seaside town of Gdansk, Poland, has one answer: a multi-story wooden crane designed in the 1300s.もっと詳しく