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发明名称
SYSTEM ZUR BESTIMMUNG DES FREIEN PUNKTES EINES IN EINEM BOHRLOCH FESTSITZENDEN BOHRGESTAENGES
摘要
申请公布号
DE3515983(A1)
申请公布日期
1985.11.07
申请号
DE19853515983
申请日期
1985.05.03
申请人
NL INDUSTRIES,INC.
发明人
G. STROUD,STANLEY
分类号
E21B47/09;G01B7/00;(IPC1-7):E21B47/09
主分类号
E21B47/09
代理机构
代理人
主权项
地址
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