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发明名称
Astronomical instrument
摘要
申请公布号
US1968461(A)
申请公布日期
1934.07.31
申请号
US19330656120
申请日期
1933.02.10
申请人
LOBECK ALBERT E
发明人
LOBECK ALBERT E.
分类号
G09B27/04
主分类号
G09B27/04
代理机构
代理人
主权项
地址
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