钻头

• Dental handpieces - high - speed air turbine handpieces
  手持式牙科器械.高速空气涡轮钻头
• Key type three - jaw drill chucks - specification
  有键型三爪钻头卡盘.规范
• Five key groove bit multiple keys bit hexagonal bit
  五键槽花键六角钻头
• Research on a new type of drilling bit in the slipping formation
  新型打滑地层钻头的研究
• Hard metal carbide inserts for mining and oil - field rock bits
  矿山油田钻头用硬质合金齿
• Drills with indexable inserts ; parallel shanks
  带可转位刀片的钻头.直柄
• Diamond drilling bits and diamond core bits
  金刚石钻头及金刚石取心钻头
• Pdc cutters improve drilling in harsh environ - ments translated
  钻头在硬地层中的钻井性能