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发明名称
EARTH DRILL
摘要
申请公布号
GB2197009(B)
申请公布日期
1990.06.13
申请号
GB19870008798
申请日期
1987.04.13
申请人
* GENERAL MINING UNION CORPORATION LIMITED;* HANNELORE BECHEM
发明人
ULRICH WILHELM * BECHEM;KLAUS * BECHEM;PHILIP CARL * BECHEM
分类号
E21B10/08;E21B4/00;E21B4/10;E21B4/16;E21B10/12
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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