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发明名称
摘要
申请公布号
FR2369414(B1)
申请公布日期
1979.02.23
申请号
FR19760033356
申请日期
1976.10.29
申请人
MARREL BENNES
发明人
分类号
E21D23/00;E21D23/04;(IPC1-7):E21D23/04;E21D19/02
主分类号
E21D23/00
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