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发明名称
Astronomisches Hilfsgeraet
摘要
申请公布号
DE882320(C)
申请公布日期
1953.07.09
申请号
DE1951H008353
申请日期
1951.05.01
申请人
HERDEN WILHELM
发明人
HERDEN WILHELM
分类号
G09B27/04
主分类号
G09B27/04
代理机构
代理人
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