“eccentric reaming bit”的概念、定义、翻译、参考文献-科学参考

单词	eccentric reaming bit
释义	eccentric reaming bit Encyclopedia 工学钻井装备释 eccentric reaming bit偏心扩眼钻头常规阶梯钻头的扩眼部分的旋转轴线偏离钻柱旋转轴线一定距离，假想存在一个以钻柱旋转轴线为中心线直径等于的圆柱，仅保留扩眼部分在假想圆柱内的刀翼，同时领眼部分和上部钻柱也必须落在假想圆柱内的结构限制的钻头。
随便看	Collective Writings from the Literary Prosperity Terrace Collective Writings on the Tieweishan Mountains collectivism collectivism education collectivity collectivization axiom collectivization of farming collectivizing relation collector collectorless flotation collector region collector-type eletrometer collect trocar needle Colleen McCullough college and department adjustment College astronomy education in mainland China college block-printed edition college English teaching College English Test Band 4 and Band 6 College English Test - Spoken English Test Band 4 and Band 6 college libraries in the early stage College of Aerospace Engineering, Chongqing University College of Archives，Cordoba University College of Cinematics and Creative Technology, Dún Laoghaire Institute of Art, Design and Technology College of Communication, DePaul University

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