故障: hitch; breakdown; stoppage; ...前: front平均: average; mean使用时间: service time大故障前平均时间: mean time to catastrophic failure; mtcf故障前平均时间: mean time before failure; mean time to failure; meantime to failure正常平均使用时间: normal and average use hours故障前平均工作时间: mean time-to-failure首次故障前平均时间: mean time to failure; mean time to first failure; meantimetofirstfailure平均寿命,平均使用时间: mean life故障前平均工作时间故障时平均时间: mean-time-to-failure故障前平均时间修理间隔平均时间: mean time before failure出现第一次故障前平均时间: mean time to first failure平均故障前时间: mean life to failure平均使用率: average service rate平均正常使用时间: mut mean up-time故障发生前平均工作时间: mean time to failure平均使用年限: average life period; average serviceable years; average useful life平均使用期限: average life time; average useful life; mean life平均使用寿命: aul average useful life; average life; mean life每个故障树的使用时间: use times from fault tree故障前的平均寿命: mean life before failure可使用时间: postion; pot life; serviceable time; up-time使用时间: elapsed time; hours of use; service time; time of service; time of usage; utility time未使用时间: unemployed time; unused time
