Length, feeding point, and orientation of the antenna in the waveguide are all arbitrary.
天线的长度、馈电点和取向都是任意的。
Meanwhile, the sufficient and necessary condition for the orientation of an arbitrary simple polygon is given.
同时，给出了任意简单多边形走向的充要条件。
Meanwhile, the sufficient and necessary condition for the orientation of an arbitrary simple polygon is given.
同时，给出了任意简单多边形走向的充要条件。
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