Besides, it concretely analysized the calculation of face chromatic number of plan view on the surface of the sphere and the ring, and promoted the application of equations.
具体分析了球面和环面上平面图面色数的计算，并将方程组的应用进行推广。
Besides, it concretely analysized the calculation of face chromatic number of plan view on the surface of the sphere and the ring, and promoted the application of equations.
具体分析了球面和环面上平面图面色数的计算，并将方程组的应用进行推广。
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