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发明名称
Traversée-jonction double avec aiguilles placées à l'extérieur du losange des pièces de coeur
摘要
申请公布号
FR38968(E)
申请公布日期
1931.08.10
申请号
FRD38968
申请日期
1930.09.01
申请人
VEREINIGTE STAHLWERKE AKTIEN-GESELLSCHAFT
发明人
分类号
E01B7/18
主分类号
E01B7/18
代理机构
代理人
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