Note: According to relative regulation, the statistical coverage of long-distance telecommunications lines is adjusted in 2004.
注：根据专业制度规定，2004年长途电信线路数据的统计口径有较大调整。
Note: According to relative regulation, the statistical coverage of long-distance telecommunications lines is adjusted in 2004.
注：根据专业制度规定，2004年长途电信线路数据的统计口径有较大调整。
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