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发明名称
Reflex camera
摘要
申请公布号
US2677997(A)
申请公布日期
1954.05.11
申请号
US19500194516
申请日期
1950.11.07
申请人
FREDERICK GRAF
发明人
GRAF FREDERICK
分类号
G03B19/12
主分类号
G03B19/12
代理机构
代理人
主权项
地址
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