With the rapid development of wireless communication technology and Internet technology, the primary service of mobile telecom is changing from voice service to data service.
随着无线通信技术和互联网技术的飞速发展，移动通信业务从以前的语音业务为主逐渐向数据业务扩展。
A single primary service and distribution transformer supply all the feeders.
用单回一次受电设施和单台配电变压器供给所有的馈电线路。
A single primary service and distribution transformer supply all the feeders.
用单回一次受电设施和单台配电变压器供给所有的馈电线路。
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