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发明名称
Dual film camera
摘要
申请公布号
US2546540(A)
申请公布日期
1951.03.27
申请号
US19480017990
申请日期
1948.03.30
申请人
GRUBEN JAMES F
发明人
GRUBEN JAMES F.
分类号
G03B19/06
主分类号
G03B19/06
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代理人
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