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防磨减扭装置
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防磨减扭装置
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anti friction and torque device
防磨减扭装置
依靠内套和本体的摩擦旋转代替钻柱接箍和套管内壁的硬摩擦旋转,实现降低钻柱扭矩的器械。
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Roughing It in the Bush
roughing mill
rough machining
roughness
roughness height
roughnessmeter
roughness sensor
rough norm
rough number
roughometer
rough relational model
rough service lamp
rough set
rough set fault diagnosis method
rough set theory
roughskin sculpin
rough surface scattering theory
rough-surface scattering theory
rough system
rough vacuum
roulette
roulette and splitting method
roulette method
round
round angle
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