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发明名称
REVERSE VALVE ASSEMBLY FOR FLUID-OPERATED DOWNWELL PUMPS
摘要
申请公布号
US3594101(A)
申请公布日期
1971.07.20
申请号
USD3594101
申请日期
1969.12.04
申请人
ARMCO STEEL CORP.
发明人
PETER S. BLOUDOFF
分类号
F04B9/10;(IPC1-7):F01L15/12;F04B47/00
主分类号
F04B9/10
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代理人
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