估计: estimate; evaluate; take sto ...使用寿命: operation life; working life ...设计使用寿命: design service life估计使用寿年: estimated service life预计使用年限(有效使用寿命): expected service life估计使用期: estimated performance; intended performance长使用寿命: long life; longevity of service; long service life可使用寿命: serviceable life使用寿命: application life; calendar life; in service life; in-service life; length of life; life cycle; life length; life time=lifetime; life-span; longevity; operating life; operation life; operational life proof cycle; operational life span; operational lifetime; service lifetime; service limit; serviceable life; useful life; useful physical life; useful time; using life; working life使用寿命期: useful life period使用寿命值: standzahl tool life index figure使用寿命, 使用期: service lifetime估计使用年期: estimated useful life估计使用年限: estimate useful life; estimated service life; estimated useful life估计使用期限: endurance expectation估计使用所限: estimated service life产品使用寿命: life-cycle车辆使用寿命: vehicle service life刀具使用寿命: cutter life服役使用寿命: in-service life钢绳使用寿命: rope life高温使用寿命: high temperature life工具使用寿命: tool life极限使用寿命: age limit; ultimate life经济使用寿命: economic service life