有效时间duration of validity详细»
有效时间significant interval;active time;up time;VT;Valid Time详细»
有效时间effective time详细»
有效时间available time详细»
有效时间available time;duration of validity;pot life;significant interval详细»
有效时间active time;duration of validity详细»
有效时间available time;effective time;operational use time详细»