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发明名称
Dehn-Sichtkartei
摘要
申请公布号
DE534982(C)
申请公布日期
1931.10.03
申请号
DED534982D
申请日期
1930.10.18
申请人
BUERO-EINRICHTUNGS-FABRIKEN FORTSCHRITT G.M.B.H.
发明人
PISKATY ERWIN
分类号
B42F17/32
主分类号
B42F17/32
代理机构
代理人
主权项
地址
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