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发明名称
CUTTER HEAD
摘要
申请公布号
GB1421260(A)
申请公布日期
1976.01.14
申请号
GB19750024010
申请日期
1973.10.05
申请人
KENNAMETAL INC
发明人
分类号
E21B7/28;E21B10/10;E21B10/52;E21D3/00;(IPC1-7):E21C17/00;E21D9/10
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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