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发明名称
BOHRVORRICHTUNG
摘要
申请公布号
DE3620500(A1)
申请公布日期
1987.01.02
申请号
DE19863620500
申请日期
1986.06.19
申请人
W-N APACHE CORP.
发明人
L. ADAIR,HAROLD
分类号
E21B19/15;(IPC1-7):E21B19/14
主分类号
E21B19/15
代理机构
代理人
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地址
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