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Telecommunications
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利益占有期
beneficial occupancy date
有关专利文献
patent associated literature
英国
通用裴利斯电信有限公司
原 GEC 与 Plessey 两公司于1988年合并而成
GEC Plessey Telecommunications Ltd.
频谱利用有效增益
effective gain in spectrum utilization
频谱有效利用
economic spectrum utilization
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