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发明名称
Light or exposure meter
摘要
申请公布号
US2247805(A)
申请公布日期
1941.07.01
申请号
US19390291927
申请日期
1939.08.25
申请人
GENERAL ELECTRIC COMPANY
发明人
FAUS HAROLD T.
分类号
G01J1/42
主分类号
G01J1/42
代理机构
代理人
主权项
地址
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