有效使用寿命 meaning in English

acceptable life
useful service life

By carefully selecting the voltage taps , the correct voltage output to match the resistance of the elements over their complete useful life can be made
仔细选择电压插孔，选择和电阻相匹配的输出电压值，这样可以延长其有效使用寿命。
By means of practical experiences in sacrificial anode sets and through calculation , the top best combination of sacrificial anode sets is determined , which obtains a balance between the effective service life of sacrificial anode sets , coating and pipeline to be protected
结合实际应用经验，通过理论计算，比选出最佳组合，使牺牲阳极组的有效使用寿命与覆盖层和被保护管道相匹配。
What ' s more , our enthusiasm for new products is encouraging what the writer giles slade calls " planned obsolescence " the tendency of manufacturers to artificially limit the useful lifespan of their products so consumers will soon have to replace them
更严重的是,我们对于新产品的热情促进了作家吉尔思.史莱德所谓的"计划性淘汰"的产生.商家们人为的限制其产品的有效使用寿命这个倾向促使消费者不得不频繁更换它们