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    ATandTCorp. AT&T公司是美国最大的固网电话服务供应商及第一大的流动电话服务供应商, 此外还提供宽频及收费电视服务。合共1.5亿户提供服务,当中8,510万户为无线用户。西南贝尔公司创办于1983年, 是根据...^

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