发明名称 ROTARY DRILL BIT
摘要 <p>A rotary drill bit for rock drilling comprising a plurality of cutting elements mounted by interference-fit in recesses in the crown of the drill bit. Each cutting element comprises an elongated pin with a thin layer of polycrystalline diamond bonded to the free end of the pin.</p>
申请公布号 CA1077018(A) 申请公布日期 1980.05.06
申请号 CA19770284200 申请日期 1977.08.05
申请人 GENERAL ELECTRIC COMPANY 发明人 BOVENKERK, HAROLD P.
分类号 (IPC1-7):21B9/36 主分类号 (IPC1-7):21B9/36
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