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发明名称
摘要
申请公布号
FR2412686(B1)
申请公布日期
1983.01.28
申请号
FR19780027766
申请日期
1978.09.28
申请人
EISENHUTTE WESTFALIA GEWERKSCHAF
发明人
分类号
E21C35/12;(IPC1-7):E21C35/12;E21C27/34;E21D23/00
主分类号
E21C35/12
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