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发明名称
WELL PACKER
摘要
申请公布号
US3566963(A)
申请公布日期
1971.03.02
申请号
USD3566963
申请日期
1970.02.25
申请人
MID-SOUTH PUMP AND SUPPLY CO. INC.
发明人
JIMMY T. BLACKLEDGE
分类号
E21B33/12;F04D13/10;(IPC1-7):E21B23/00
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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