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发明名称
ZENTRIERVORRICHTUNG ZUM ZENTRIEREN EINES ROHRES IN EINEM BOHRLOCH
摘要
申请公布号
DE4202299(A1)
申请公布日期
1992.07.30
申请号
DE19924202299
申请日期
1992.01.28
申请人
MOBIL OIL CORP., FAIRFAX, VA., US
发明人
GOODWIN, KORWIN JOE, FORT WORTH, TEX., US
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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