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经营范围
发明名称
DRILLING DEVICE
摘要
申请公布号
AU548365(B2)
申请公布日期
1985.12.05
申请号
AU19820088203
申请日期
1982.07.26
申请人
ENGTECH S.A.
发明人
KAALSTAD, O.W.
分类号
E21B;E21B10/04;E21B10/06;E21B10/08;E21B10/12;E21B10/28;E21B10/30;E21B10/32;E21B10/34;E21B17/10
主分类号
E21B
代理机构
代理人
主权项
地址
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