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?. ????-?????? ????????? ???????
??????? ??? ???????: 1,400°C (2,552°F) ????????? ????????? ???? ???, ????? ??????, ??? ??? ???????? ??????? ?????????, ???? ??? ???????? ??????? ???? ????? ???????
?????? ???????: ????????? ???????????? ??????? 70% ????????? ??????, ???? ??????? ???? ????? ???? ????? ??? ????? ????
????? ???? ?????????: ?.?? ????/??·??? ????????? ??, ??? ??????? ????? ??? ??? ????? ?????? ??-??% ????? ????
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