operating period〔名词〕运行期详细»
operating period〔名词〕经营期详细»
operating period〔名词〕运行期,操作周期,运行时间详细»
使用期限life;life length;lifetime;service life;serviceable life;useful life详细»
使用期限length of life;life span;service life;serviceable life详细»
使用期限age;durability;life;limit of age;operating life;period of service;working service详细»