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发明名称
Camera diaphragm
摘要
申请公布号
US2209639(A)
申请公布日期
1940.07.30
申请号
US19380244704
申请日期
1938.12.08
申请人
FERDINAND TONNIES HANS
发明人
TONNIES HANS FERDINAND
分类号
G03B7/085
主分类号
G03B7/085
代理机构
代理人
主权项
地址
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