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发明名称
Adjustable film indicator device for photographic roll-film cameras
摘要
申请公布号
GB877326(A)
申请公布日期
1961.09.13
申请号
GB19570035992
申请日期
1957.11.19
申请人
RHEINHOLD HEIDECKE;HORST FRANKE
发明人
分类号
G03B1/66
主分类号
G03B1/66
代理机构
代理人
主权项
地址
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