在 Scala 中，方括号表示参数化的类；在这里，参数是 ID 的类型和实际模型类的类型。

The square brackets denote a parameterized class in Scala, and in this case, it takes the type of the ID and the type of the actual model class.

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首先对常见的工艺补充面截面线类型进行分析，建立数学解析模型并进行参数化设计，并且给出特殊问题的处理方法。

At first, the section curves of addendum is analysed, mathematic analytic models are established, the parametric design is finished and method to deal with especial questions is presented.

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