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???????? ????? ???????? (HEC) ?????? ????? ??????????? ??????? ??? ???? ???? ?? ????? ???????? ???????? ??????? ??????? ????????? ??????????. ??????? ?? ???????? ???????? ?????? ?????? ?????? ??? ???????? ??????? ?????? ??? ?????? ???? ?????? ?????? ????????. ?????? ???? Zhejiang Haishen New Materials Co., Ltd. ???????? ????? ???????? ???? ?????? ???????? ????? ?????? ?????????? ????????? ???????? ???????? ???????. ????? ???????? ????? ???????? ????? ?????? ???????? ??? ???????? ??????? ?????? ??????? ?????? ??? ???????? ????????? ??? ????? ??????? ??????? ??????? ??????? ?????????? ????????? ???????. ?? ???????? ?????????? ????????? ??? ???????? ????? ???????? ????? ???? ?? ???????? ??????? ??? ???? ????? ??????? ???????. ????? ???? ???????? ???????? ?????????? ?????? ????????? ????? ?????? ?????????. ????? ??? ??? ??????? ???????? ?? ???????? ????????? ?? ????????? ????????? ??? ???????? ????? ???????? ????? ?????? ??????? ?????? ?????? ?????? ????.