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发明名称
Planungstafel
摘要
申请公布号
DE844685(C)
申请公布日期
1952.07.24
申请号
DE1950H006748
申请日期
1950.11.23
申请人
HARSIG NIELS FREDE
发明人
HARSIG NIELS FREDE
分类号
G09B29/00;G09D1/00
主分类号
G09B29/00
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