“Master Backup Slave” architecture

1+1 backup

4%Cr backup roll

active backup line

adaptive fault-tolerant backup

analog backup unit

and Redundancy backup

anti-disaster backup

application backup

Archive Backup

Asynchronous Backup

Asynchronous Dial-up Backup

auto backup power switching unit

automatic backup

automatic backup power supply switching

automatic backup power supply switching device

automatic backup power system

automatic backup source

automatic circuit closing for backup power

Automatic Hot Backup