“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	History of Chinese Popular Literature History of Chinese Pottery and Porcelain History of Chinese Prose History of Chinese Psychology history of Chinese publishing History of Chinese Ryhthmical Prose History of Chinese Science and Technology Archives history of Chinese sociology history of Chinese statistical law history of Chinese tea History of Chinese textile science and technology History of Chinese Theatre History of Ci and Qu Poetry History of Ci Poetry history of city water conservancy in the world history of civilization history of coal chemical processing history of Commonwealth of Dominica history of Commonwealth of the Northern Mariana Islands history of composite materials developments history of contemporary Chinese aviation industry history of Cook Islands history of corn cultivation history of corn cultivation in China history of Costa Rica

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