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发明名称
Remotely operable means for focusing photographic enlargers
摘要
申请公布号
US2500656(A)
申请公布日期
1950.03.14
申请号
US19460676422
申请日期
1946.06.13
申请人
BLOOM CECIL A
发明人
BLOOM CECIL A.
分类号
G03B3/02
主分类号
G03B3/02
代理机构
代理人
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