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发明名称
DRILL BIT
摘要
申请公布号
IE780449(L)
申请公布日期
1978.09.03
申请号
IE19780000449
申请日期
1978.03.03
申请人
SANDVIK AKTIEBOLAG
发明人
分类号
E21B10/52;E21B10/56;(IPC1-7):E21B10/56
主分类号
E21B10/52
代理机构
代理人
主权项
地址
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