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发明名称
摘要
申请公布号
DE2122785(A1)
申请公布日期
1972.11.16
申请号
DE19712122785
申请日期
1971.05.08
申请人
发明人
分类号
E01H8/06
主分类号
E01H8/06
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代理人
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地址
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