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发明名称
LEHR- UND ANSCHAUUNGSMITTEL FUER DEN VERKEHRSUNTERRICHT.
摘要
申请公布号
DE1640488(U)
申请公布日期
1952.07.03
申请号
DE195200W4948U
申请日期
1952.03.03
申请人
GERHARD WEGENER
发明人
GERHARD WEGENER
分类号
主分类号
代理机构
代理人
主权项
地址
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