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Wheel (3500-3350 BC)

The invention of the wheel has been pivotal for technology in general, setting the foundation for future developments such as the water wheel, the cogwheel, and the spinning wheel. Modern descendants include the propeller, the jet engine, and the turbine. Pictured is the Wheel of the Etruscan chariot (ca. 530 BC)

車輪（公元前3500年到3350年）

車輪的發明對于技術的總體發展至關重要，為未來的進一步發展，如水車、齒輪、紡車的發明奠定了基礎。車輪在現代的衍生物包括螺旋槳、噴氣式發動機和渦輪機。圖中是伊特魯里亞雙輪戰車的車輪（約在公元前530年）。