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发明名称
IMPROVEMENTS IN/RELATING TO CUTTING ELEMENTS FOR ROTARY DRILL BITS
摘要
申请公布号
GB8815333(D0)
申请公布日期
1988.08.03
申请号
GB19880015333
申请日期
1988.06.28
申请人
REED TOOL CO LTD
发明人
分类号
B23P15/28;E21B10/56;E21B10/567
主分类号
B23P15/28
代理机构
代理人
主权项
地址
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