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经营范围
发明名称
Bohrmeissel mit geschützten Dichtungen
摘要
申请公布号
DE69215002(D1)
申请公布日期
1996.12.12
申请号
DE19926015002
申请日期
1992.03.12
申请人
BAKER-HUGHES INC., HOUSTON, TEX., US
发明人
HALL, JAMES R., HUFFMANN, TEXAS 77336, US;MAURSTAD, CARY A., KINGWOOD, TEXAS 77345, US
分类号
E21B10/22;E21B10/25;F16J15/34;(IPC1-7):E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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