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发明名称
Perfectionnements apportés aux moyens pour diffuser la teneur de livres ou documents, notamment de documents scientifiques
摘要
申请公布号
FR825712(A)
申请公布日期
1938.03.11
申请号
FRD825712
申请日期
1937.08.17
申请人
发明人
DAMBLANC LOUIS;BRETON JEAN
分类号
G03B21/10
主分类号
G03B21/10
代理机构
代理人
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地址
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