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1. ?????

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Process for Producing Washed Sand from Granite Overburden

?. ????? ??? ??????????

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???? ??????????? ??? ????????? ??????????, ???????? ????????? (overburden) ???? ????, ???? ??? ??? ???????????? ??????? ??? ?????????? ?????????? ?????? ???? ??????? ??? ??????? ?????? ???????? ?????? ??????? ???. ??????????? ???? ??????????????, ???????? ????????? ?????? ?????? ?????? ??% ??? ??? ????????? ?????? ?????? ???, ???????? ?? ????? ???? ?????? ???????? ???? ??? ????.

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