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发明名称
Gerät zum Betrachten von Schrift- oder Bildwerke darstellenden Filmdiapositiven.
摘要
申请公布号
CH246723(A)
申请公布日期
1947.01.31
申请号
CHD246723
申请日期
1945.01.04
申请人
ZWIAUER,ALFRED,DR.
发明人
ZWIAUER,ALFRED,DR.
分类号
G03B23/12
主分类号
G03B23/12
代理机构
代理人
主权项
地址
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