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发明名称
Doppelherzstueck
摘要
申请公布号
DE588057(C)
申请公布日期
1933.11.13
申请号
DED588057D
申请日期
申请人
VEREINIGTE STAHLWERKE AKT.-GES.
发明人
分类号
E01B7/28
主分类号
E01B7/28
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代理人
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