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发明名称
DIFFRACTION GRATING
摘要
申请公布号
GB9001546(D0)
申请公布日期
1990.03.21
申请号
GB19900001546
申请日期
1990.01.23
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
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