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发明名称
Autofocus photographic enlarging apparatus
摘要
申请公布号
US2465692(A)
申请公布日期
1949.03.29
申请号
US19460682755
申请日期
1946.07.11
申请人
MARTINSSON GUNNAR R C
发明人
MARTINSSON GUNNAR R. C.
分类号
G03B27/36
主分类号
G03B27/36
代理机构
代理人
主权项
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