underwing coverts下覆羽
underwing moth后翅蛾
white underwing白裳夜蛾
underwing pod翼下吊舱
underwing carrier翼下吊架;机翼下吊架
underwing pylon翼下外挂梁
underwing boom翼下喷杆
underwing launcher翼下发射架
underwing rack翼下发射导轨
N（名词） the hind wing of an insect, esp when covered by the forewing 后翅