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