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发明名称
Process for making rails
摘要
申请公布号
US3251215(A)
申请公布日期
1966.05.17
申请号
US19620221160
申请日期
1962.09.04
申请人
FIRMA HUTTENWERK OBERHAUSEN A.G.
发明人
GRAEF RUDOLF
分类号
B21B1/08;C21D8/00;C21D9/04;C22C38/04
主分类号
B21B1/08
代理机构
代理人
主权项
地址
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