The generic method to determine equipment update occasion is the model of applying conception of equipment natural life, or technical life, or economic life in isolation.

常用的确定装备更新时机的方法是孤立地应用装备的自然寿命，或者技术寿命，或者经济寿命概念的模型。

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Annual inspection and special inspection and jacket for ship and platform, system inspection for ship structure, equipment and piping and evaluate for their natural life.

船舶、钻井平台、导管架的年检、特检以及船体、机电设备、管线的系统检验和寿命评估等。

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It results in a series of accidents such as natural gas pipeline leakage, equipment burning caused by lightning stroke, which brings about great loss to industrial production and people's life.

因金属腐蚀而导致的一系列事故，如天然气管道泄露、雷击烧毁设备等，给工业生产和人们日常生活带来巨大的损失。

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