The generic method to determine equipment update occasion is the model of applying conception of equipmentnaturallife, 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。
2
Annual inspection and special inspection and jacket for ship and platform, system inspection for ship structure, equipment and piping and evaluate for their naturallife.
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。
3
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.