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套管扶正器
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套管扶正器
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套管程序
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casing centralizer
套管扶正器
安装在套管本体上,能够使套管居于井眼中心,用以减小套管下放时的阻力和发生黏卡,有利于提高水泥浆的顶替效率和水泥环厚度分布均匀的装置。
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least squared criterion
least square estimation
least square filtering
least square fitting
least square method
least square min-norm estimation
least squares
least squares approximation
least squares estimate
least squares estimation
least squares estimator
least squares fitting
least squares identification
least squares image matching
least squares method
least square solution
least squares principle
least squares problem
least squares solution
least time path
least universal exponent
least upper bound
least value
least-value problem
least water lily
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