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发明名称
SCHMIERMITTELDRUCKREGLER FUER ERDBOHRER UND VERFAHREN ZUM SCHMIEREN DESSELBEN
摘要
申请公布号
DE2824124(A1)
申请公布日期
1979.01.25
申请号
DE19782824124
申请日期
1978.06.01
申请人
HUGHES TOOL CO.
发明人
C. MILLSAPPS,STUART
分类号
E21B10/22;E21B10/24;F16C33/76;F16N11/04;(IPC1-7):E21B9/10
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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