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经营范围
发明名称
Photographischer Belichtungsmesser.
摘要
申请公布号
AT127090(B)
申请公布日期
1932.02.25
申请号
ATD127090
申请日期
1930.08.01
申请人
ERNST BERTRAM
发明人
ERNST BERTRAM
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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