In this paper, the common transmission methods between local exchanges are compared on economics by means of breakeven analysis.
本文采用盈亏点分析法对常见市话局间中继传输方式进行了经济性比较。
In this paper, the common transmission methods between local exchanges are compared on economics by means of breakeven analysis.
本文采用盈亏点分析法对常见市话局间中继传输方式进行了经济性比较。
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