Describing the problem of two-way access; seting up and analysing a mathematical model in view of two-way (access) fixed pricing problems.

对双向接入问题进行了描述，针对双向接入定价问题建立了数学模型并进行了分析。

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In addition, the pricing model introduced in this paper also cited a number of cases that use mathematical model of the pricing calculation.

此外，本文在介绍模型定价中还列举了一些案例说明运用数学模型的定价计算。

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