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发明名称
Vorrichtung fuer photographische Vergroesserung und Verkleinerung
摘要
申请公布号
DE509872(C)
申请公布日期
1930.10.18
申请号
DE1928W079989D
申请日期
1928.07.25
申请人
COLIN MARTIN WILLIAMSON;STUART WILLIAMSON
发明人
分类号
G03B27/58
主分类号
G03B27/58
代理机构
代理人
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