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发明名称
Improvements in or relating to exposure-meters for photographic purposes
摘要
申请公布号
GB416553(A)
申请公布日期
1934.09.17
申请号
GB19340002305
申请日期
1934.01.23
申请人
ERNST PRESSER
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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