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经营范围
发明名称
Well packer
摘要
申请公布号
US2216358(A)
申请公布日期
1940.10.01
申请号
US19380247597
申请日期
1938.12.24
申请人
LANE-WELLS COMPANY
发明人
SPENCER LLOYD
分类号
E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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