同时，还给出了几组完备的正交函数系。

Meanwhile, many important complete orthogonal function systems are obtained.

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此法提供了推导正交坐标系下电并矢格林函数的完备展开式的一种有效途径。

This method offers an effective way to derive the complete expansions of the electrical dyadic Green 's functions in orthogonal coordinates.

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