使用寿命operational life span;work life;working life详细»
使用寿命operation life;service life详细»
使用寿命end point;endpoint;life duration;life time;working life详细»
使用寿命service life详细»
使用寿命service life详细»
使用寿命length of life;operating life;service life详细»
使用寿命service life;working life;working service详细»