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经营范围
发明名称
Deep well pump
摘要
申请公布号
US2146500(A)
申请公布日期
1939.02.07
申请号
US19360072303
申请日期
1936.04.02
申请人
ERB WILLIAM B
发明人
ERB WILLIAM B.
分类号
F04B47/00
主分类号
F04B47/00
代理机构
代理人
主权项
地址
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