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发明名称
摘要
申请公布号
FR2086445(A1)
申请公布日期
1971.12.31
申请号
FR19710014907
申请日期
1971.04.27
申请人
DROGE GEORG
发明人
分类号
E04C3/16;(IPC1-7):E04C3/00
主分类号
E04C3/16
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