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friction reduction stabilizer
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friction reduction stabilizer
Encyclopedia
工学
井下工具
释
friction reduction stabilizer
滚子减阻扶正器
将钻柱与井壁间的滑动摩擦转变为滚动摩擦,用以减小钻柱下行阻力的工具。
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unicursal curve
unicursal graph
unicursal involution
unicursal line
unicursal problem
unicursal quartic
unicursal surface
unicursal theorem
unicyclic
unicyclic graph
unidecagon
unidecimal number
unidecimal number system
unidental ligand
unidentifiability
unidentifiable
unidentified flying object
unidentified reading frame
unidentified source
unidiameter
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unidimensional
unidimensional estimator
unidimensional hologram
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