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经营范围
发明名称
Dam construction and repair
摘要
申请公布号
US2217470(A)
申请公布日期
1940.10.08
申请号
US19390293175
申请日期
1939.09.02
申请人
CEMENT GUN COMPANY
发明人
COLLIER BRYAN C.
分类号
E02B7/08
主分类号
E02B7/08
代理机构
代理人
主权项
地址
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