?? ?????? ???????? ???? ??????? ??? ???? ????? ????? ???? SANDI Technology Co.???? Wugong Xinxin ???? ??????? ??? ????????.("???? ??????") ?????? ???? ??????????? ("????? ???? ???????????") ????? "????? ????? ????? ???????? ?????? ?????????? ???? ?????? 5N ?????? ?????"? ????? ?? ??????? ????? ???? ???????? ???????? ???????? ???? ??????? ?????? ???? ?? ??? 2025. ???? ????? ??? ????? ????? ???????????? ???????? ???????? ?? ???? ??????? ???? ????? ???????? ?? ???? ??????????? ???????? ???????? ?????? ??????? ??????? ???????? ???????? ?? ???? ????? "????? ?? ????? ??????".

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1- ????? ??? ?????? ????? ?????. ????? ?????? ??????? ?????? ??????? ?? ???? ???? ??????? ????????? ??????? ?? ???? ???? ??????? ????????? ?????? ?????????? ????? ?????? ???? 50-160 ??? ?????? ????? ????? ??????? ??????? ??? 80%.

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