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????????? (??????? ????? ???? ?????????) ?? ??????? ?????? ?????? ???????? ??? ????????? ????????? ??? ??? ?????? ??? 600 ??? ?? ???????? ??? ???? ????? ????? ?? ????? ????? ????? ???? ???? ????? ???? ????? ???? ????? ?????? ?????? ?????? ????? ?????? ??????.

?? ??????? ???????????????????? ?? ??????? ??? ??????? ???????? ?????? ?????? ?????? ?? ??????? ?????????? ???????? ???????? ?????? ?? ????????? ??? ????? ??????? ???? ???? ????? ?????? ????? ??????? ???? ?? 15?.

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

01?? ???? ????? ??????????? ????????? ???????? ????? ????????? ??? ???? ???????? ?????? ????????????????????? ???????? ?? ????? ?????????? ???? ????? ??????? ????? ???? ???? ???? ???? ?????? ????? pH ??? ????? ?? ???????? ?????? ????????? ?? ????????? ??????? ????? ??????.

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06???? ????????? ?? ????? ???????? ?????? ????? ????? ????????? ??????.

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

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10- ?????????: ????? ??? ????????? ????? ????? ????? ?????? ????? ???????? ?? ????? ????????? ??? ????? ???????? ?????? ??????.

11- ??????? ????????? ????? ???? ??? ????? ??????? ???? ??????? ?? ???? ?????? ??????? ????? ???????? ??? ??? ???? ??? ???? ?????? ????? ???????.