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发明名称
INRICHTING VOOR HET AANGEVEN VAN EEN HOEK WAARONDER EEN BOORSTANG ZICH IN EEN BOORGAT BEVINDT.
摘要
申请公布号
NL160050(C)
申请公布日期
1979.09.17
申请号
NL19690006770
申请日期
1969.05.02
申请人
BYRON JACKSON, INC., LONG BEACH, CALIFORNIE, VER. ST. V. AM.
发明人
分类号
E21B7/04;E21B7/06;E21B47/024;E21B47/12;G01C9/00;G01C9/12;(IPC1-7):E21B47/02
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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