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发明名称
IMPROVEMENTS RELATING TO DUPLEX COMMUNICATIONS SYSTEMS
摘要
申请公布号
GB9217525(D0)
申请公布日期
1992.09.30
申请号
GB19920017525
申请日期
1992.08.18
申请人
SHAYE COMMUNICATIONS LIMITED
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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