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发明名称
IMPROVEMENTS IN OR RELATING TO CUTTING ELEMENTS FOR ROTARY DRILL BITS
摘要
申请公布号
GB2218134(B)
申请公布日期
1992.11.18
申请号
GB19890007557
申请日期
1989.04.04
申请人
* REED TOOL COMPANY LIMITED;* CAMCO DRILLING GROUP LIMITED
发明人
JOHN DENZIL * BARR;THOMAS ALEXANDER * NEWTON,JR
分类号
B23P5/00;B23P15/28;E21B10/56;E21B10/567
主分类号
B23P5/00
代理机构
代理人
主权项
地址
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