“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	common scouring rush common selfheal common selfheal fruit~spike Common Sense common sense commonsense knowledge commonsense knowledge base common sense morality commonsense reasoning common sign common single mode fiber common snapdragon common source coding common sowthistle common species common speech common spider conch common stock financing common stock issuance price common straight swift common stylized opera movements of the mise-en-scene of roles and extras common subdivisions common subexpression elimination commons use right common symptoms of cortical dysfunction of the nervous system

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