长幅外摆线的等距曲线的英文

equidistant curve of prolate epicycloid

• 长:    older; elder; seni ...
• 幅:    width of cloth
• 外:    outside; external ...
• 的:    4次方是 The fourth po ...
• 等距:    equidistance; isom ...
• 曲线:    curve; curved line