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发明名称
摘要
申请公布号
FR2018095(A1)
申请公布日期
1970.05.29
申请号
FR19690014697
申请日期
1969.05.08
申请人
GEHLEN WALTER
发明人
分类号
E01C9/08;(IPC1-7):E01C3/00
主分类号
E01C9/08
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代理人
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