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发明名称
FLEXIBLE DRILL COLLAR
摘要
申请公布号
CA833399(A)
申请公布日期
1970.02.03
申请号
CAD833399
申请日期
申请人
YOUNGSTOWN SHEET AND TUBE COMPANY
发明人
CHARLES H. ELLIOTT;ROY H. CULLEN;JIMMIE R. AKER;WILLIAM E. BURKE
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