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对组合式牙轮钻头作了简要介绍，分析了其碎岩原理，并与刮刀钻头及滚刁钻头进行了特性对比，阐述了设计、使用要点。
A brief introduction of the combined roller cone bit is given, the principle of the rock breaking is analyzed, and the characteristics of the roller bit and the rolling bit are compared. The design and the essentials of the application are expounded.