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发明名称
Well tool
摘要
申请公布号
US2786534(A)
申请公布日期
1957.03.26
申请号
US19530355065
申请日期
1953.05.14
申请人
PAGE JR JOHN S
发明人
JR. JOHN S. PAGE,
分类号
E21B33/129
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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