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经营范围
发明名称
Pitless pumper
摘要
申请公布号
US2578669(A)
申请公布日期
1951.12.18
申请号
US19490125938
申请日期
1949.11.07
申请人
BUTTERFIELD SR JAMES E;BUTTERFIELD JR JAMES E;JOHNSEN HAROLD A
发明人
SR. JAMES E. BUTTERFIELD,;JR. JAMES E. BUTTERFIELD,;JOHNSEN HAROLD A.
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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