By comparison, mobile phone masts can cover a huge geographic area comparatively cheaply, and although their connection speed will be low, it can be applied almost immediately.
相形之下，手机信号具有覆盖范围广、成本低的优点，虽然速度会有些慢，但用手机几乎可以随时随地上网。
Second generation mobile communication system (2g) is digital cellular system which can provide low-speed data business.
第二代移动通信系统(2g)是数字移动系统，能提供低速率数据业务。
KJ271 underground staff positioning system with the features of far transmission distance, high flow, low-power, high-speed identification of mobile identity, fast identification and stability.
KJ271矿用人员定位系统具有传输距离远、大流量、超低功耗、高速识别移动标识物、快速的识别及其稳定的特点。
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