It communicates with the base station via quad-band cellular signals or via satellite, allowing it to be deployed within a wide range of potentially hostile water, oil, gas and electricity networks.
这种系统通过四频蜂窝信号发生器或卫星与基站通讯，可以在一些潜在的不易操作的水、油、气和电力系统上广泛部署。
We are specializing in the mobile phone, especially the quad-band dual sim mobile phone.
我们是专门从事手机，特别是四频双卡手机。
We are specializing in the mobile phone, especially the quad-band dual sim mobile phone.
我们是专门从事手机，特别是四频双卡手机。
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