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发明名称
摘要
申请公布号
FR2021312(A5)
申请公布日期
1970.07.17
申请号
FR19690031828
申请日期
1969.09.18
申请人
INSTITUT MASHINOSTROENIA
发明人
分类号
E01C19/17;(IPC1-7):E01C19/00
主分类号
E01C19/17
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代理人
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