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经营范围
发明名称
Water gate
摘要
申请公布号
US2637171(A)
申请公布日期
1953.05.05
申请号
US19490083817
申请日期
1949.03.28
申请人
BLACK AVERNO T
发明人
BLACK AVERNO T.
分类号
E02B13/00
主分类号
E02B13/00
代理机构
代理人
主权项
地址
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