[数] 可展切线曲面 developable surface: 可展开面; 可展曲面algebraic developable surface: 代数可展曲面isotropic developable surface: 迷向可展曲面non developable ruled surface: 非可展直纹曲面; 非可展直纹曲线non-developable ruled surface: 非可展直纹曲线下载手机词典可随时随地查词查翻译