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发明名称
摘要
申请公布号
FR2103911(A5)
申请公布日期
1972.04.14
申请号
FR19710028437
申请日期
1971.08.03
申请人
DE JONGE MARTINUS
发明人
分类号
E01C9/10;E04C2/42;E04F19/10;(IPC1-7):16S3/00;04C2/00
主分类号
E01C9/10
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