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发明名称
NON-MAGNETIC MANGANESE-CHROMIUM STEEL AND TUBULAR ELEMENT OF A DRILLING COLUMN MADE FROM THIS STEEL
摘要
申请公布号
EP0277065(B1)
申请公布日期
1990.07.25
申请号
EP19880400112
申请日期
1988.01.19
申请人
S.M.F. INTERNATIONAL
发明人
HOUVION, JEAN-PAUL
分类号
C22C38/38
主分类号
C22C38/38
代理机构
代理人
主权项
地址
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