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经营范围
发明名称
Casing pump drain valve
摘要
申请公布号
US2674200(A)
申请公布日期
1954.04.06
申请号
US19520315990
申请日期
1952.10.21
申请人
HOWE CHARLES P
发明人
HOWE CHARLES P.
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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