exterior angle

基本解释

A second method is to furnish the surfaces with hinges and to use an exterior sector with drilled holes for each angle setting.
第二种方法是在翼面上装置铰链，用一个对不同安装角钻有不同孔的外部扇形件与之配合。
Utilizing the extension of the polygon exterior angle sum theorem, directions of curvilinear polygons were judged and redundant polygons were deleted.
利用多边形外角定理的推广，判断偏置后曲线多边形的旋向，删除多余多边形。
Look the thing that this should be clearly, but demand comes from a client namely (here wants to consider) from the angle of interior and exterior client.
看起来这应该是显而易见的事，但需求就是来自客户（这里要从内部和外部客户的角度考虑）。