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发明名称
摘要
申请公布号
DE1922458(B2)
申请公布日期
1978.09.07
申请号
DE19691922458
申请日期
1969.04.30
申请人
DRESSER INDUSTRIES, INC., DALLAS, TEX. (V.ST.A.)
发明人
DAVIS, MIKE;YOUMANS, ARTHUR H.
分类号
G01V5/10;(IPC1-7):E21B49/00;E21B47/10;G01V5/00
主分类号
G01V5/10
代理机构
代理人
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