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。
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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