The compound drilling mechanism of turbodrill is elaborated in detail after analyzing the characteristics of turbodrill and coordination requirements for PDC bits.
从涡轮钻
的特性和PDC钻头配
要求着手，详细论述了涡轮钻
钻
的
；
The compound drilling mechanism of turbodrill is elaborated in detail after analyzing the characteristics of turbodrill and coordination requirements for PDC bits.
从涡轮钻的特性和PDC钻头配要求着手，详细论述了涡轮钻钻的；
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