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发明名称
摘要
申请公布号
FR2086990(A5)
申请公布日期
1971.12.31
申请号
FR19700013704
申请日期
1970.04.16
申请人
GONTARD NOEL
发明人
分类号
E04G23/02;E04G23/04;E04G25/06;(IPC1-7):E04G21/00
主分类号
E04G23/02
代理机构
代理人
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