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()) ??? ??? ??? ?????: ????? ???????? ?????? ?????, ???? ??? ???? ??? ???? ????? ?????? ?????? ????? ???? ???? ????, ?????? ?????? ????? ???? ????? ?????? ????????? ??????? ???????? ????? ???????????.
()) ????? ??? ????, ???????? ????????? ?????? ???? ???? ?????? ??? ????, ???????? ???? ???????? ? ????? ????, proportion 38 ?? b? ???? ?????? ????????? ????? ??????.
????? ?? ?? ?????????? ????????? ???. ????? ?????????? ????????, ????? ??? ??? ????????? ???????? ???? ??? ????????? ????????? ?????? ?????? ????. ????????? ????? ????????? ??? ????? ????? ??? ????? ??? ???? ?????? ?????????? ????????????? ????? ???????? ??????? ???????? ???? ???????.
()) ???? ??????: ??? ??? ????? ???????? acid??? ??? ????? ???? ????????????? ???? ???????? ??????? ?????? ????? ??????? ???? ??? ?????.
???? ???????????????, ????? ???????? ????? ???????????? ????????????? ???, ??? ??? ??? ?? ???????? ?????; ???? ??????? ???????? ???????? WEIHUA ????.
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