“偏心扩眼钻头”的概念、定义、翻译、参考文献-科学参考

单词	偏心扩眼钻头
释义	偏心扩眼钻头 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	National Astronomical Observatory of Chile National Astronomical Observatory of Japan National Astronomical Research Institute of Thailand National Astronomy and Ionosphere Center national atlas National Automobile Quality Supervision and Inspection Center（Beijing Tongzhou） National Autonomous University of Honduras National Autonomous University of Mexico National Autonomous University of Nicaragua national autonomy National Autonomy Party National Award for Excellent Publishing Scientific Research Paper National Award for Natural Sciences National Award for Science and Technology Progress National Award for Technological Invention National Award of Excellent Script for Drama and Opera national balance sheet National Ballet of China National Bank Act National Bank of Costa Rica National Bank of Cuba National Bank of Nicaragua National Bank of Panama National Bardo Museum National Basic Medical Insurance, Industrial Injury Insurance and Maternity Insurance Drug Catalog（China）

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