назначенный срок службы(The design life of a component or product is the period of time during which the item is expected by its designers to work within its specified parameters Alex Lilo)
проектный срок службы(The design life of a component or product is the period of time during which the item is expected by its designers to work within its specified parameters; in other words, the life expectancy of the item. It is the length of time between placement into service of a single item and that items on-set of wear-out. wiki; источник: словарь Извекова Alexander Demidov)
проектный срок службы(The design life of a component or product is the period of time during which the item is expected by its designers to work within its specified parameters; in other words, the life expectancy of the item. It is the length of time between placement into service of a single item and that items on-set of wear-out. wiki ; источник: словарь Извекова)
