?? ???? ?? ??? ????? ?????? ?????? ?????? ? ???? ????? ?????? ?? ??????? ?? ???? ?????? ??. ??? ???? ????? ???????? ????? ?????? ?????? ???? ???? ???????? . ????? ????? ?? ?????? ???????? ????? ????? ??? ???? ????? ???? ????? ?????? ??? ??? ??? ??? . ????? ?????? ???????? : ????? ????? ?????? ??????? ??? ???? potable ????? ????? ???????