concave surface
短语词组
- concave spherical surface 凹球面
- concave ellipsoidal surface 凹椭球面
- concave rotative surface 凹回转面
- concave cambered surface 移动摆杆
- annular concave spherical surface 凹球面环状
- concave aspheric surface 凹非球面
- concave curve surface 凹曲面
- Hoop concave spherical surface 仿形加工滚轮凹球面
- concave -surface 水面下凹 返回 concave surface