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发明名称
WELL PACKER
摘要
申请公布号
GB2091318(B)
申请公布日期
1984.09.12
申请号
GB19810036953
申请日期
1981.12.08
申请人
BROWN OIL TOOLS INC
发明人
分类号
E21B33/1295;(IPC1-7):E21B33/12
主分类号
E21B33/1295
代理机构
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