concave surface
短语词组
- concave spherical surface 凹球麪
- concave ellipsoidal surface 凹橢球麪
- concave rotative surface 凹廻轉麪
- concave cambered surface 移動擺杆
- annular concave spherical surface 凹球麪環狀
- concave aspheric surface 凹非球麪
- concave curve surface 凹曲麪
- Hoop concave spherical surface 倣形加工滾輪凹球麪
- concave -surface 水麪下凹 返回 concave surface