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发明名称
Arch dam
摘要
申请公布号
US1806255(A)
申请公布日期
1931.05.19
申请号
US19290355719
申请日期
1929.04.17
申请人
FREDRIK GRONER CHRISTIAN;SIGURD KLOUMANN
发明人
GRONER CHRISTIAN FREDRIK;KLOUMANN SIGURD
分类号
E02B7/12
主分类号
E02B7/12
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代理人
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