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发明名称
BOHRLOCHGERAET ZUM ZEMENTIEREN VON BOHRLOECHERN
摘要
申请公布号
DE3125035(A1)
申请公布日期
1982.03.25
申请号
DE19813125035
申请日期
1981.06.26
申请人
HALLIBURTON CO.
发明人
DURWARD SZARKA,DAVID
分类号
E21B33/127;E21B33/14;E21B33/16;E21B34/14;(IPC1-7):E21B33/13
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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