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发明名称
Verfahren zur Herstellung von Loechern mit verstaerktem Rande in eisernen Schwellen
摘要
申请公布号
DE597907(C)
申请公布日期
1934.06.01
申请号
DE1931R083183D
申请日期
1931.11.01
申请人
MAX RUEPING
发明人
分类号
B21K7/00
主分类号
B21K7/00
代理机构
代理人
主权项
地址
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