?????????? Weihua - ???? ????? ?????? ????; ??? 10 ???? ?????? ??????? ?????? ???? ??????, ????? ???? ????? ????. 500 ??????? ???????? ?????, ???? ???? ?? ???? ???? ?? ± 0.01 ?"?. ?????? ????? ???????;

??????? ????? ?? ????? ????? ?? ???? ????? ????:

???? ????? ??????? ?????? ????? ???????? ?? ?????? ??????? ????? ????????? ???????, ??????? ????? ???? ?????? ??????. ?? ????? ???????? ?????;

(1) ????? ?? ???? ????? ??????? ???? ????? ?????? ??? ?????? ?? ????? ????, ????? ?????? ?????? ?? ???????, ?????? ????? ??????? ?? ??? ?????. ?????? ???? ?????.

(2) ????? ???? ?????? ?????? ???? ????? ????? ?????, ???? ????, ?? ??? ????? ???? ?? ???? ??????, ???? ?? ??????, ???? ??? ????, ????? ?????? ????? ????? ?????? ????? ?????? ????, ?????? ?? ?????? ?? ????? ?????, ???? ????? ??????? ??????, ??? ????? ???? ?????? ???? ????? ?????? ????????, ?? ??? ???? ?? ????? ??????.

(3) ????? ?? ???? ????? ??????? ???? ?????? ?????? ????? ?????, ????? ?????? ??????? ?????? ??? ???? ???? ?? ??? ?????, ???? ???? ?????? ??? ?????? ?? ??????.

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