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经营范围
发明名称
Erosion check dam
摘要
申请公布号
US2318349(A)
申请公布日期
1943.05.04
申请号
US19400368183
申请日期
1940.12.02
申请人
WILEY BRYCE R
发明人
WILEY BRYCE R.
分类号
E02B7/16
主分类号
E02B7/16
代理机构
代理人
主权项
地址
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