- 沿: water's edge; bank
- 螺旋面: helicoid; helicoidal; helica ...
- 运动: arrange things or get things ...
- 螺旋面: helicoid; helicoidal; helical convolute; helical surface; helicoidal surface; screw surface; skew helicoid; skewed surface; spiral surface
- 常螺旋面: ordinary helicoid
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