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发明名称
SYSTEM FOR INNDRIVING AV EN USTIV ANORDNING I EN BROENN HVOR DEN VANSKELIG LAR SEG FREMFOERE VED HJELP AV TYNGDEKRAFTEN.
摘要
申请公布号
NO905229(D0)
申请公布日期
1990.12.03
申请号
NO19900005229
申请日期
1990.12.03
申请人
INSTITUT FRANCAIS DU PETROLE
发明人
WITTRISCH, CHRISTIAN;DUBOIS, JEAN-CLAUDE
分类号
E21B23/14;G01V11/00;(IPC1-7):E21B/
主分类号
E21B23/14
代理机构
代理人
主权项
地址
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