david bushnellとは意味:{人名} : デビッド?ブッシュネル◆《米国》で最初に戦闘(1776、NY 港)に使われた潜水艦を発明(1773、あだ名は Turtle)。木製、一人乗り。スクリュー、操行舵、バラストタンク排水もすべて手動。 david bushnell meaning: Noun: David Bushnell American inventor who in 1775 designed a man-propelled submarine that was ineffectual but subsequently earned him recognition as a submarine pioneer (1742-1824) - Bushnel...david bushnell artinya:bushnelldavid bushnell перевод:Бушнелл, Дэвид