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发明名称
VAERKTOEJ TIL LOESBAR INDSAETNING I ET BOREHULSUDSTYR
摘要
申请公布号
DK294588(D0)
申请公布日期
1988.05.30
申请号
DK19880002945
申请日期
1988.05.30
申请人
OTIS ENGINEERING CORPORATION
发明人
SPEEGLE, STEVEN C.;WALP JR., DOUGLAS W.;BULLARD, ROY P.
分类号
E21B23/02;E21B29/00;E21B34/00;E21B34/10;(IPC1-7):E21B23/02
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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