???????? ? 50 ?????? ?? ???? ? ??????????~~??????? ???????????? ?????????? 64 ?2. ? ???????? ??? ???????, ???? ?????? ???????, ?????????, ?????, ???????.~~? ????? ??????????? ?????? ??????? ?????????????? - ????????????, ????????, ?????????, ????, ?????, ?????, ??????? ???, ??????????? ??????????. ?????????? ?? ???? - 50 ??????.~~~~???????? ?????? ??????????????, ? ????? ??????? ? ?????? ?? ????? ??? 4-6% ???????.