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发明名称
Roll film camera having differential means for operating pressure pads
摘要
申请公布号
US2495019(A)
申请公布日期
1950.01.17
申请号
US19460663547
申请日期
1946.04.19
申请人
GRAFLEX, INC.
发明人
NADEL LOUIS D.
分类号
G03B1/48
主分类号
G03B1/48
代理机构
代理人
主权项
地址
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