• 1. undevelopable: 不能展开的
• 2. undevelopable surface: 不可展面 | 不能展开曲面
• 3. undevelopable curved surface: 不可展曲面

更多释义

• 1.According to their developable characteristic, curved surfaces can be divided into developable and undevelopable ones.
  按照它们的可展性质，曲面可以分为可展曲面和不可展曲面。
  dict.yoduao.com
• 2.The mathematical model of parallel and undevelopable ruled surface was constructed, the algorithm for NC ultrasonic grinding surface was founded.
  建立平行、不可展直纹面数学模型，确定超声磨削加工平行、不可展直纹面时磨轮空间轨迹及其算法。
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• 3.There are many different methods to develop the same undevelopable curved surface, the criteria must be created to evaluate which one is the most appropriate.
  对同一不可展曲面的展开可有多种近似展开方法，究竟哪种方法更为合理应建立相应的评判标准。
  dict.yoduao.com

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