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发明名称
Optical exposure meter
摘要
申请公布号
US2195748(A)
申请公布日期
1940.04.02
申请号
US19390271800
申请日期
1939.05.04
申请人
ALOIS LEBER
发明人
LEBER ALOIS
分类号
G01J1/40
主分类号
G01J1/40
代理机构
代理人
主权项
地址
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