Improvement on Design of Curvature Radius of Sphere Surface on Big Rib for Tapered Roller Bearings or Spherical Thrust Roller Bearings是什么意思_Improvement on Design of Curvature Radius of Sphere Surface on Big Rib for Tapered Roller Bearings or Spherical Thrust Roller Bearings在线翻译_英语_读音_用法_例句