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发明名称
Drilling apparatus
摘要
申请公布号
AU6294096(A)
申请公布日期
1997.02.05
申请号
AU19960062940
申请日期
1996.07.05
申请人
ABA-SUN PTY. LIMITED
发明人
ROBERT GRAY
分类号
E21B17/07;E21B21/12;E21B49/00;E21B49/02
主分类号
E21B17/07
代理机构
代理人
主权项
地址
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