helical surface
短语词组
- d helical profile surface 三维螺旋齿廓曲面
- helical curved surface 螺旋曲面
- Hyperslender helical -surface 超细长螺旋曲面
- helical shaped surface plates 螺旋形状表面极板
- helical -surface of the screw 螺杆加工
- mouldboard with helical surface 螺旋型犁壁 返回 helical surface