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