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发明名称
摘要
申请公布号
FR2291322(B3)
申请公布日期
1977.04.15
申请号
FR19740021150
申请日期
1974.06.18
申请人
AUPRETRE SERGE
发明人
分类号
E04B2/84;(IPC1-7):E04B2/00
主分类号
E04B2/84
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