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?????????, ?????????? ?????????? ?????? ????. ?? ?? ????? хим????? ?????, ?? ?? ?????, ??????, ???? ??? ??? ??? ?????? ????? ?????, ??? ???? ????? ????????? ????? ??? ????. ??????? ????????????? 2.56 ?? 2.76 ??????? ????. ??? ???? ???????? ?????? 6-6.5 ???. ???????? ??? ????? ????????? ?????????????? ?????? ??? ??????? ??????????? ???? ???? ????.
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