downbend

美 　英

• 網(wǎng)絡(luò)洼地

例句

three kinds of devices of drag reducing are presented: swept wing-tip, stage by stage swept wing and downbend wing-tip.

介紹了三種翼梢減阻裝置：后掠翼梢、分段后掠機翼和下彎翼梢。