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发明名称
CENTRAL PILOT BIT WITH ECCENTRIC REAMER
摘要
申请公布号
AU605756(B2)
申请公布日期
1991.01.24
申请号
AU19870069073
申请日期
1987.02.19
申请人
SANTRADE LIMITED
发明人
KJELL-OVE JANSSON
分类号
E21B7/20;E21B10/32;E21B10/40;E21B10/66;(IPC1-7):E21B10/26
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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