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发明名称
Improvements in frames or slides for viewing transparencies
摘要
申请公布号
GB856652(A)
申请公布日期
1960.12.21
申请号
GB19580008714
申请日期
1958.03.18
申请人
REGINA GLASS COMPANY LIMITED
发明人
SCHULLER GERHARD WERNER
分类号
G03B21/64
主分类号
G03B21/64
代理机构
代理人
主权项
地址
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