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发明名称
Plural range masking means for photoelectric measuring instruments
摘要
申请公布号
US2926562(A)
申请公布日期
1960.03.01
申请号
US19570657552
申请日期
1957.05.07
申请人
FRANKE & HEIDECKE, FABRIK PHOTOGRAPHISHER PRAZISIONS-APPARATE
发明人
BRETTHAUER HERMANN;MADGE JOACHIM;KROGER WOLF
分类号
G01J1/42;G02B5/00;G03B17/06
主分类号
G01J1/42
代理机构
代理人
主权项
地址
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