useful life span造句

• It's what we're after in attempts to extend the useful life span ."
• As a rule of thumb, every 10 degrees rise halves the useful life span.
• It has a useful life span of 15 years.
• As each component within a product is reviewed, those with a relatively short useful life span are identified.
• While computers seem to have the useful life span of a butterfly, good optics dang near last forever.
• Though the property is actually increasing in value, the government allows owners to systematically depreciate the property over its projected useful life span.
• It must be stressed that the useful life span needs to be applied with due regard to the economic environment, whereas the technical life span may be indefinite.
• NHK 2000, " Normal Production Costs " ) provide detailed information on the useful life span, which is generally judged to be 60 80 years for multiple dwellings and 50 80 years for office buildings.