摺疊式摩托車
Boeing X-51 - Wikipedia, the free encyclopedia交通尖峰時刻塞到連機車都動彈不得嗎? 美國21歲青年古拉克 (Benjamin Gulak) 發明「變形機車」,只要按鈕就能從機車變身為體積只剩一半的單輪車,不僅能輕鬆穿梭車陣,連牽進電梯都不成問題。 古拉克4年前隨父親到亞洲出差時,發現北京、上海和香港等城市充滿汽機車廢氣,他認為唯有電動車輛才能改The Boeing X-51 (also known as X-51 WaveRider) is an unmanned scramjet demonstration aircraft for hypersonic (Mach 6, approximately 4,000 miles per hour (6,400 km/h) at altitude) flight testing. It completed its first powered hypersonic flight on 26 May 2...
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