underground communication meaning in English

地下通信

Plastics . unplasticized polyvinyl chloride pipes for underground communication lines . specifications
塑料制品.地下通信线路用非增塑聚氯乙烯管件.规范
At last the computer processes the data and outputs reporting tables , curves and analyzes the results . the communication between the underground communication extension and the ground receiving mainframe of the monitoring system uses rds transmitting technology which has high transmitting efficie ncy and strong antijamming ability
计算机做最后的数据处理、输出报表、曲线及分析结果等。监测系统的井下通讯分机与地面接收主机的通讯采用rds传输技术，传输效率高，抗干扰能力强。