backupsn.备份
backupn.后备
backup utility file system后备实用程序文件系统
Backup Maintenance Activity辅助保养活动
backup power switchover unit备自投
backup roll grinding machine支承辊磨床
Backup Aircraft Authorizatio备用飞机的审定
backup for disaster recovery灾难备份
Backup Flight Control System备用飞行控制系统
Backup Control and Audio Unit后援控制和音频装置
Backup and Restore and Attach备份、还原及附加
Backup and Restore and Detach备份、还原及分离