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???? ???? ????? ?????? ???? ????? ????? ???? ??????? (GB 2760-2025) ???????? ??????? ??????????? ??? ?????, ???? ?????? (??????? ??????? ????????????????) ? ???? ????????? ?????-????????? ??? ???????????? ????????????? ???? ??????? ????????? ????????? ????
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???????? ?????? ????? ?????? (??????? ??????? ???????? ??????? 0.04-0.5 ?????/??????), ???????? ??????? ????????????????? ????? ?????????????? ????????? ?????? ????????? ????? ???? ?????, ??? ???? ?? ???????? ?????? (400 ????????/100 ?????) ????? ????? ???????? ???? ????????
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