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发明名称
Bildfenster für photographische Vergrösserungsgeräte.
摘要
申请公布号
CH173770(A)
申请公布日期
1934.12.15
申请号
CHD173770
申请日期
1934.01.28
申请人
WEISSE,ERNST
发明人
WEISSE,ERNST
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主分类号
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代理人
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