Based on the classification of signal characteristic, a model of quantitative recognition for oil well tubing defects was built.

建立了基于特征分类的油管缺陷量化识别模型。

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The instrument can be used in on-line continuous quantitative inspection of oil well tubing covered with greasy dirt or other non-magnetic...

仪器可用在井口对油管进行在线连续定量检测，检测结果不受管表面的油泥或其它非导磁性材料的影响。

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Based on the magnetic leakage flux technique, the principle of localized defect inspection and wall thickness measurement in oil well tubing has been researched.

文中研究了油管局部缺陷和壁厚减薄缺陷的漏磁场检测原理。

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If you can squeeze in more outdoor fun before the bell rings, Adventures Unlimited also offers challenging ropes courses as well as tubing, canoeing and fishing for additional fees.

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One was lowering coil tubing into the well--inexpensive but didn't work well.

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There were reports recently that it had tried and failed to buy special tubing which could be used for centrifuges to enrich uranium, though some say such tubing could be used for other purposes as well.

BBC: Iraq dossier - what to look for