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???? ?????? ???? ??????? ?? ?????? ???????? ?? 18 ????? 20 ???? ????? ???????? ???? ???????? 6 ???? ??? ?????? ?????? ?????????? ????? ????? (???? ??? ???????? ????? 1250 ??)? 3 ??????? ?? ????? ??????? ??????? ???????? ?? ??????? ??????? ????? ???????????? ???????? ?? ??????? ??????? ????? ????? ????? ?????? ??? ?????? ?????? ??????? ?????? ?? ??? ????? ???????? ???????? ??????? ?? ?????? ?????? ??? ???? ?????? ?????? ???? ???? ? ????? ????? ???? ? ??????? ???????? ????? ????? ???? ???????? ???????? ?? ??????? ??????? ?????. ???? ?????? ???? ????? ????? 200 ? 300 ? 400 ?? ?????? ??????? ??????? ?????? ???? 0.15 - 2.0? ???? ≤ 1250 (??? ?? ??? ????????)? ????? ????? 2B ? ?????????? ?????? ???????? ??????? ???? ?????? ????? ??????. ????? ??????? ???????? ???????? ???????? ????? ???????? ????????? ???????? ?????? ?? ??????? ???????. ???????? ???? ????? ????? ?????? ????? ?????? ?? ??????? ??????? ????????? ???????? ???? ????????? ????? ???? ?????? ?????? ??????? ????? ????????.
????? ?????? ?????? ?????? ?????? ?????? ??????? ?????? ?????? ???????? ???????? ?????????. ????? ??????? ?????????? ????? ???????? ????? ???????? ?????? ????? ?????? ????? ??????. ????? ??? ??????? ?????? ?? ???????? ?? ?????? ???????? ????? ?????? ?????? ??????? ????????? ???? ??? ????? ?????? ????.