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Inventor API 中的零件图、部件图和工程图
创建 Planar Sketch
•Add(PlanarEntity As Object, [UseFaceEdges As Boolean = False]) As PlanarSketch
§等同于 二维草图 命令.
§方向是 Inventor 自动定义
§是否包含输入参数(平面)的边（UseFaceEdges）可选
•AddWithOrientation(PlanarEntity As Object, AxisEntity As Object, NaturalAxisDirection As Boolean, AxisIsX As Boolean, Origin As Object, [UseFaceEdges As Boolean = False]) As PlanarSketch
§API 才有的功能，你可以用它指定草图的方向来创建草图