English translation for "useful life span"

有效寿命

Related Translations:

useful resistance:  有益阻力

useful energy:  有效能有用能量有用声能

useful tool:  得力工具

useful materials:  有用物质

useful sentences:  吵架好用句实用句子

useful property:  有效成分

useful transmission:  有用透射

very useful:  顶有用

useful horsepower:  有效功率有效马力

useful consciousness:  有效意识

Similar Words：

"useful life" English translation, "useful life and effectiveness" English translation, "useful life estimation" English translation, "useful life n" English translation, "useful life period" English translation, "useful lift" English translation, "useful load" English translation, "useful luminous flux" English translation, "useful magnetic flux" English translation, "useful magnification" English translation