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发明名称
Irrigation dam
摘要
申请公布号
US2174845(A)
申请公布日期
1939.10.03
申请号
US19380219446
申请日期
1938.07.15
申请人
SMALL HERVEY W
发明人
SMALL HERVEY W.
分类号
E02B13/02
主分类号
E02B13/02
代理机构
代理人
主权项
地址
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