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经营范围
发明名称
CYCLOIDAL DRILL BIT
摘要
申请公布号
AU557138(B2)
申请公布日期
1986.12.04
申请号
AU19830021357
申请日期
1983.11.15
申请人
BODINE, A.G.
发明人
ALBERT G. BODINE
分类号
E21B;E21B7/24;(IPC1-7):E21B7/24
主分类号
E21B
代理机构
代理人
主权项
地址
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