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发明名称
Magnifying measuring instrument
摘要
申请公布号
US1803483(A)
申请公布日期
1931.05.05
申请号
US19270229062
申请日期
1927.10.27
申请人
AMERICAN OPTICAL COMPANY
发明人
O'MEARA DENIS HENRY
分类号
G01B9/00
主分类号
G01B9/00
代理机构
代理人
主权项
地址
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