Free- form surface的用法和樣例：
例句
- Then the equation sets were solved by difference method to get the surface data of the free reflector.
採用差分法求解微分方程組得到自由曲面反光器的面形數據。 - When a freeform surface is being milled, the interference may exist anywhere around the cutter circumference, in addition to the tool-driving plane.
加工自由曲面時，刀具干涉可能出現在包括刀具驅動面在內的刀具周圍任何區域。
