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发明名称
Cutter elements for rotary drill bits
摘要
申请公布号
US4987800(A)
申请公布日期
1991.01.29
申请号
US19890371711
申请日期
1989.06.26
申请人
REED TOOL COMPANY LIMITED
发明人
GASAN, JOSEPH A.;TAYLOR, MALCOLM R.;BEX, PHILLIP
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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