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发明名称
METHOD OF DETERMINING THE PRESENCE OF AN UNCONSOLIDATED PLUG
摘要
申请公布号
US3490528(A)
申请公布日期
1970.01.20
申请号
USD3490528
申请日期
1968.01.12
申请人
ORVILLE G. MCCLAIN
发明人
ORVILLE G. MCCLAIN
分类号
E21B33/134;(IPC1-7):E21B47/02;E21B33/12
主分类号
E21B33/134
代理机构
代理人
主权项
地址
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