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发明名称
In die Strassenoberflaeche eingebaute Verkehrssignaleinrichtung
摘要
申请公布号
DE544658(C)
申请公布日期
1932.02.20
申请号
DED544658D
申请日期
1930.12.16
申请人
ROBERT FREDERICK BROWN
发明人
分类号
E01F9/06
主分类号
E01F9/06
代理机构
代理人
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