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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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personalized recommendation
personalized recommender system
personalized retrieval
personalized search
personalized service
personalized website navigation
personal knowledge management
personal move
personal name seals of the Han Dynasty
personal performance
personal privacy protection
personal probability
personal project
personal property
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personal protective equipment
personal protective equipment for building construction
personal protective equipment, PPE
personal responsibility theory
personal right
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