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发明名称
Dam
摘要
申请公布号
US1902353(A)
申请公布日期
1933.03.21
申请号
US19300448504
申请日期
1930.04.30
申请人
AMBURSEN CONSTRUCTION COMPANY, INC.
发明人
BURROUGHS EDGAR H.
分类号
E02B7/14
主分类号
E02B7/14
代理机构
代理人
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