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发明名称
Lens holders for photographic projector enlargers
摘要
申请公布号
US2777358(A)
申请公布日期
1957.01.15
申请号
US19530395503
申请日期
1953.12.01
申请人
TUTWILER FRANK H
发明人
TUTWILER FRANK H.
分类号
G03B27/52
主分类号
G03B27/52
代理机构
代理人
主权项
地址
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