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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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tree seed harvesting
tree seed processing
tree seed storage
trees evaluation
trees image understanding
Trees on the Edge of Cliff
tree sooty blotch
tree sorting
trees outside forests
tree species composition
tree spread
tree sprinkling tanker
trees pruning
trees skyline
tree stiletto machine
tree structural model of text
tree structure
tree substitution
tree substitution grammar
tree substitution grammar, TSG
tree support
tree tending
tree theorem
tree tomato
tree topology
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