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经营范围
发明名称
Foot valve
摘要
申请公布号
US1890683(A)
申请公布日期
1932.12.13
申请号
US19290391727
申请日期
1929.09.11
申请人
HUGHES OWEN J
发明人
HUGHES OWEN J.
分类号
F04D9/00
主分类号
F04D9/00
代理机构
代理人
主权项
地址
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