underground communication duct 地下通信管道
mine underground communication 煤矿井下通信
underground communication pipe 地下通信管道
underground communication cable 地埋通信电缆
underground communication system 矿井通信系统
Underground Communication Systems 地下通讯系统
underground communication in coal mine 煤矿井下通信
The wireless LAN constructed by fiber communication technology effectively solves the problems existing in traditional leak cable communication, and thus it will become the developing direction of future underground communication in China due to its advantages.
由光纤通信技术组成的无线局域网有效的解决了传统的泄漏电缆通信中存在的问题,且由于其具有众多优点成为我国未来矿山井下通信的发展方向。
参考来源 - 大红山铜矿井下综合通讯系统的研究与构建·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
He was on this big underground communication west coast tour.
他对这个大的地下通信西海岸之旅。
The practice proved that the filter could realize system identifying and noise removing and achieve the effect of improving quality and increasing distance of underground communication.
实践证明该滤波器较好地实现了系统识别和噪声消除，能够达到改善井下通信质量、增加井下通信距离的效果。
There's been no communication with the miners since an underground explosion, and there are concerns about the threat of poisonous gases.
自从发生煤矿爆炸以来，救援人员没有和被困矿工联系，而是更加关注的是有毒气体的威胁。
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