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发明名称
Oil well pumping assembly
摘要
申请公布号
US2891408(A)
申请公布日期
1959.06.23
申请号
US19530344047
申请日期
1953.03.23
申请人
BURT JR JOSEPH P
发明人
JR. JOSEPH P. BURT,
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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