????????: ???? ? electrical ????? ??? ?????????? ???? ???????? ???, ?????? ?????? ????? ????? ???? ????? ????? ?????? ??? ???? ?????? ?????? ??? ???? ?????? ????? ??????? ?????? ??? |
???????: ?????? ????? ??? ??? ???? ??????????? ????? ??????? ???????? ????? ?????? ??? ???? ?????????????? |
?????? ???????: ??????? elemble ??????????????, ????????????? ????? ???????, ???????? ???? ??????????????? ??? ????????????? ????? |