US airframer Boeing says its new "transonic' wing design could will allow airplanes to fly higher and closer to the speed of sound.
원문출처 : https://www.cnn.com/travel/article/boeing-transonic-wing-scli-intl/index.html
원문출처 : https://www.cnn.com/travel/article/boeing-transonic-wing-scli-intl/index.html