backupsn.备份
backupn.后备
backup for diaster灾难备份
backup arrangement后备安排
backup dispatching备调
backup and restore备份与恢复
backup/recovery备份与恢复
backup water level壅高水位
backup roll change支承辊换辊
backup optimization数据库备份
backup roll bending支承辊弯曲
Backup Fuel Control备用燃料控制