双曲面次镜的英文

• hyperboloidal secondary mirror

• 双曲面:    double curved surface; hyper ...
• 次:    order; sequence
• 镜:    looking glass; mirror
• 曲面次数:    surface degree
• 双曲面:    [数学] double curved surface; hyperboloid◇双曲面齿轮 [机械工程] hypoid gear; 双曲面齿轮传动 [机械工程] hypoid axle; hyperbolical gearing; 双曲面图 hyperbolic chart