短语词组短语sweepback impeller 后掠式叶轮;翻译sweepback wing 后掠翼;后掠机翼sweepback agitator 后掠形搅拌器;翻译sweepback tail 后掠尾翼angle of sweepback 后掠角;翻译;后掠角英语sweepback low -wing 后掠下单翼sweepback space debris 后掠飞片sweepback k wing 后掠机翼 返回 sweepback