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发明名称
Fremgangsmaade til Opnaaelse af Kontrastvirkning ved Billedoptagelse eller Kopiering samt til Fremgangsmaadens Udførelse anvendelig Bærer.
摘要
申请公布号
DK47170(C)
申请公布日期
1933.04.03
申请号
DKD47170
申请日期
1931.01.13
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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