cone bit roller bit
牙轮钻头
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The dynamics of roller cone bit under the interaction of drilling string, bit and rock during the drilling process was investigated.
研究了钻井过程中钻柱、钻头、岩石相互作用下的牙轮钻头动力学特性。
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