GF(2~m)上的椭圆曲线
air-cooling unitary air conditioner(heat pump
半椭圆形弹簧
half-elliptic spring(semi-elliptic spring
semi elliptic spring
half elliptic spring
semi-elliptical spring
half-elliptic spring
半椭圆形垄
ridge of half ellipse shape
变形椭圆齿轮
Deformable elliptic gears transmission
变形椭圆模板
deformable ellipse template