Because of being on the border between China and Viet Nam and on the vital communication line from China to south-east Asia, Fangcheng Harbor City has obvious superiority in place.
防城港市地处中越边境，是我国大西南地区通往越南和东南亚的交通要道，区位优势明显。
The cost for a communication line between two stations is proportional to the length of the line.
两个通讯站间通讯线路的费用与线路的长度成正比。
The master computer is used as the centre of control system and synthetic judgment, and is connected with PLC by RS-485 communication line to perform real-time monitoring on local apparatus.
控制主机做为系统的控制和综合判断中心，利用RS-485通信线与PLC进行通信，实现现场设备的实时监控。
Based upon existing optic fiber cable telecommunication, this article puts forward using wavelength division multiplex technology for remote image transmission without adding communication line.
文章提出在原有光纤光缆电信传输业务基础上，不增加通信线路，利用光纤波分复用技术实现局、矿远程图象传输。
Equivalent interfering current is an important parameter to calculate interfering influence of H. V. power line on communication line. It is a statistic value created on the basis of measurements.
等效干扰电流是计算高压电力线路对电信线路干扰影响的一个重要参数，它是一个建立在测量基础上的统计值。
Equivalent interfering current is an important parameter to calculate interfering influence of H. V. power line on communication line. It is a statistic value created on the basis of measurements.
等效干扰电流是计算高压电力线路对电信线路干扰影响的一个重要参数，它是一个建立在测量基础上的统计值。
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