平均使用寿命为3年。
这样的建筑需要频繁维护且经常遭受损坏，平均使用寿命仅十年。
Such buildings require regular maintenance, are often prone to damage and last on average only 10 years.
该研究结果对于现场提高钻柱的平均使用寿命具有重要的工程理论指导意义。
It is significant for adjusting drill pipe sequence to improve average life of drill string.
一个大型挡风玻璃雨刷厂的经理，需要估计一下在一般驾驶条件下雨刷平均使用寿命的期望值有多大。
A large manufacturer of windshield wiper blades needs to estimate the mean life users of the blades can expect under typical driving conditions.
花边镀锌门框压型设备采用各排平均受力原则，全线滚轮平均受力，磨损均衡，延长轧辊使用寿命。
Lace galvanized frame molding equipment adopts the principle of the average stress, also the average stress of roller, the balance of the wear, prolong the service life of roll.
固定资产折旧采用年限平均法并按其入账价值减去预计净残值后在预计使用寿命内计提。
Fixed assets are depreciated using the straight-line method based on their costs less estimated residual values over their estimated useful lives.
按规程应用该装置配制的含氟混合气，可以使准分子激光器的有效工作时间延长2 ~3倍，激光器中镜面的使用寿命平均延长3 ~5倍。
The fluorine mixed gas prepared by this device, which may prolong the working hours of excimer-laser 2 to 3 times and prolong the average useful time of lens of laser 3 to 5 times.
均衡充电系统能在充电时主动地将充电能量平均分配给组中各单体，从而有效提升电池组的可用容量，并延长其使用寿命。
Charge equalization systems can deliver charge energy equally to individual cells in the string. In this way, the available capacity will be enhanced and the life cycle will be extended.
航线使用中如有50%以上发动机实际使用寿命超过平均翻修寿命，发动机就可以延寿，给出了延寿估算方法。
If the 50% actual operating time of aircraft engine is greater than the mean TBO in airline operation, the TBO can be prolonged. The method for estimating the prolonged life is also given.
航线使用中如有50%以上发动机实际使用寿命超过平均翻修寿命，发动机就可以延寿，给出了延寿估算方法。
If the 50% actual operating time of aircraft engine is greater than the mean TBO in airline operation, the TBO can be prolonged. The method for estimating the prolonged life is also given.
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