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发明名称
Kunstpflasterstein mit in den senkrechten Seitenwaenden angeordneten Nuten
摘要
申请公布号
DE559337(C)
申请公布日期
1932.09.19
申请号
DED559337D
申请日期
1930.08.06
申请人
ERICH KRETZNER
发明人
分类号
E01C5/00
主分类号
E01C5/00
代理机构
代理人
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