????? ??????? ???????? ????? ?????? ?????? ?? ????? ???? ?????? ???? ??????? ????? ?? ????? ???????? ??? ??????? ??????????? ??????? ???????. ??? ???? ???????? ???? ???? ?????? ?????? ???????? ?? ???? UPS (Uninterruptible Power Supply) ?? ???? ?????? ????????. ??? ???? ?????? ?? ???????? ?? ?????? ?