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发明名称
Abrading casing centralizer
摘要
申请公布号
US3172475(A)
申请公布日期
1965.03.09
申请号
US19620214134
申请日期
1962.08.01
申请人
MOORE WESLEY W
发明人
MOORE WESLEY W.
分类号
E21B17/10;E21B37/02
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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