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发明名称
Magnifying device
摘要
申请公布号
US1798953(A)
申请公布日期
1931.03.31
申请号
US19290373722
申请日期
1929.06.26
申请人
OTTO RENNICKE
发明人
RENNICKE OTTO
分类号
G01B3/02
主分类号
G01B3/02
代理机构
代理人
主权项
地址
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