service life time
service life time-
Taking account the features of durable goods , such as long service life and time / price-dependent demand of customers , a customer consumption model was developed .
针对耐用品生命周期长，产品需求依赖于时间、价格等特点，建立顾客消费的模型。
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In order to lengthen the service life and overhaul cycle time , the paper analyzes the causes for the failure and puts forward the measures to avoid these failures .
为了延长发动机的使用寿命和大修周期，文章在分析产生故障原因的基础上，提出了避免故障的措施。
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It may decrease fatigue damage causing by rolling contact and side damage on track and prolong rail service life 0.5 ~ 1 time by means of grinding rail track .
通过对钢轨的修磨可减少由于滚动接触疲劳引起的钢轨损伤，减少钢轨侧面磨损，可延长钢轨的使用寿命0.5~1倍。
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