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经营范围
发明名称
TURBODRILL
摘要
申请公布号
GB2091322(B)
申请公布日期
1984.09.12
申请号
GB19820001130
申请日期
1982.01.15
申请人
RUHRKOHLE AG
发明人
分类号
E21B4/00;E21B4/02;E21B4/16;F03B13/02;(IPC1-7):E21B4/02
主分类号
E21B4/00
代理机构
代理人
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地址
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