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发明名称
Well apparatus and method
摘要
申请公布号
US3050121(A)
申请公布日期
1962.08.21
申请号
US19570654423
申请日期
1957.04.22
申请人
U. S. INDUSTRIES, INC.
发明人
GARRETT HENRY U.;PETERS CLIFFORD M.
分类号
E21B43/14
主分类号
E21B43/14
代理机构
代理人
主权项
地址
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