圆─椭圆─圆孔型  round-oval-round pass

圆－椭圆－圆  round-oval-round

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

扁椭圆形输送管  fiat oval duct

变形椭圆  indicatrix ellipse; ellipse of distortion; deboation ellipsoid; ellipse of deformation

变形椭圆齿轮  Deformable elliptic gears transmission

变形椭圆模板  deformable ellipse template

变形椭圆体  deformation ellipsoid

变形椭圆轴  axis of the indicatrix

标准椭圆形封头  standard elliptical head

波浪形椭圆焊管  Corrugated oval welded pipe

长椭圆形  long oval

长椭圆形[的]  oblong

长椭圆形的  oblong

成椭圆形  ovalization; ovalisation

呈椭圆形  ovalize

菲拉泰克斯椭圆形截面的橡皮芯弹力纱  Filatex

刚性椭圆形储液罐  rigid elliptic liquid-storage-tank