在实际生活中经常会遇到角的旋转量不在[0°，360°]这个区间的情况，为了描述这种现实状况，我们把角的概念加以推广。
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其特征是应用渐开线的性质来任意等分任意角。
The utility model is characterized in that arbitrary angle can be equally divided according to the involute property.
用尺规将一个任意角或弧绝对准确三等分是不可能的。
It is impossible to divide a given common Angle or arc (instead of the particular angles or arcs) into three equal parts by using a rule and compasses.
给出了用WKB方法计算以任意角入射的电磁波在不均匀等离子体中的衰减。
The attenuation of electromagnetic waves at an arbitrary angle of incidence by a nonuniform unmagnetized plasma is given by using WKB method.
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