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发明名称
摘要
申请公布号
DE2032455(A1)
申请公布日期
1972.01.05
申请号
DE19702032455
申请日期
1970.07.01
申请人
发明人
分类号
E21D15/44;F15B15/16
主分类号
E21D15/44
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代理人
主权项
地址
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