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发明名称
Protective sleeve for slips
摘要
申请公布号
US2293974(A)
申请公布日期
1942.08.25
申请号
US19410384897
申请日期
1941.03.24
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
ECKEL JOHN E.
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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