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发明名称
MEJORAS INTRODUCIDAS EN LA PREPARACIoN DE ELEMENTOS FOTOGRáFICOS
摘要
申请公布号
ES204920(A1)
申请公布日期
1952.10.16
申请号
ES19200002049
申请日期
1952.08.08
申请人
E. I DU PONT DE NEMOURS & CO.
发明人
分类号
(IPC1-7):G03
主分类号
(IPC1-7):G03
代理机构
代理人
主权项
地址
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