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经营范围
发明名称
OPTICAL COMMUNICATIONS SYSTEM
摘要
申请公布号
GB8900731(D0)
申请公布日期
1989.03.08
申请号
GB19890000731
申请日期
1989.01.13
申请人
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
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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