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发明名称
Improvements in photometric apparatus for timing photographic exposures
摘要
申请公布号
GB529907(A)
申请公布日期
1940.12.02
申请号
GB19390015756
申请日期
1939.05.26
申请人
JOSEPH MINA BING
发明人
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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