为了演示深度防御的工作原理，我们将首先研究包含三个主要层次的中心模型：核心层、中间层和最外层。
To show how the defense in depth works, we will first examine a centric model of three primary layers: core, middle, and outermost.
利用这一模型，研究了腐蚀速率、缺陷深度、管道壁厚和工作压力等因素对管线可靠性的影响。
The effects of corrosion rate, defect depth, thickness of pipe and operation pressure on pipeline reliability were investigated with this model.
利用这一模型，研究了腐蚀速率、缺陷深度、管道壁厚和工作压力等因素对管线可靠性的影响。
The effects of corrosion rate, defect depth, thickness of pipe and operation pressure on pipeline reliability were investigated with this model.
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