underground antenna的意思|示意

Such a hole is likely used as an underground antenna able to recharge the batteries of submarines in the Pacific and Indian Ocean through ELF broadcasts.

这种黑洞很可能用作地下天线能够充电电池潜艇在太平洋和印度洋，通过极低频广播。

Introduced some new type underground mobile communication system, such as leakage communication system, distributed antenna communication and region mobile communication, etc.

介绍了多信道漏泄通信系统、分布天线通信系统和小区制移动通信系统等一些新型矿井移动通信系统。

One of the museum exhibits is this underground magnet antenna from the Bita cryptographic hardware.

博物馆的展馆之一是来自于 Bita 加密硬件的地下磁铁天线。