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前言从1965年起,塑料埋地电缆作为有线通信网中的配线电缆,已在全军范围内推广使用,对我军有线通信从架空转入地下起了一定的作用。但经过一段时间的使用,发现全塑电缆存在一些问题,其中最主要的是电缆护套受损后的纵向进水问题。由于纵向进水,轻则影响传输质量,重则使线路无法开通,而且查找故障修复线路比较困难。1975年部队向我所提出了要研制具有防水、防潮能力的全塑埋地电缆的任务。
Preface From 1965 onwards, as a distribution cable in wired communication network, plastic buried cables have been widely used throughout the army and have played a certain role in the cable communications of our military going from overhead to underground. However, after a period of use, it was found that there are some problems with all-plastic cables, of which the most serious one is the longitudinal water inflow problem after the cable jacket is damaged. As the vertical water, ranging from the impact of transmission quality, heavy lines can not be opened, and find fault repair line more difficult. In 1975, the military proposed to me the task of developing a plastic-encased cable with waterproof and moisture-proof capabilities.