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发明名称
Exposure-meter for photographic purposes
摘要
申请公布号
US1846486(A)
申请公布日期
1932.02.23
申请号
US19300452054
申请日期
1930.05.13
申请人
AGFA ANSCO CORPORATION
发明人
HEYMER GERD
分类号
G01J1/60
主分类号
G01J1/60
代理机构
代理人
主权项
地址
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