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发明名称
Visor de bolsillo para diapositivas
摘要
申请公布号
ES58717(U)
申请公布日期
1957.04.01
申请号
ES19170000587U
申请日期
1957.02.15
申请人
GERMÁN INDUSTRIAL, S. A.
发明人
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主分类号
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