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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。
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non-extinction
non-facet growth
non faradaic current
non-faradaic current
nonfaradaic current
nonfatal trauma
non-fatty acid in woody oil
non-feasible
non-feasible set
non-feasible solution
non-Fermi liquid
non-Fermi liquid behavior
non-Fermi-liquid behavior
nonferroelectric photore-fractive materials
non-ferromagnetic expansion alloy
non ferrous metal
non-ferrous metal
nonferrous metal
non-ferrous metal electrometallurgical machinery
nonferrous-metallic mineral resources
non-ferrous metal pyrogenic process smelting machinery
nonferrous metals
nonferrous metals industry
nonferrous metals industry in the world
non-ferrous metal slag
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更新时间:2026/9/22 11:47:32