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发明名称
摘要
申请公布号
FR2208045(B1)
申请公布日期
1977.02.11
申请号
FR19730014144
申请日期
1973.04.18
申请人
EISENHUTTE WESTFALIA GEWERKSCHAF
发明人
分类号
E21D23/00;E21C35/14;E21D23/26;E21F13/08;(IPC1-7):E21C35/14
主分类号
E21D23/00
代理机构
代理人
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地址
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