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

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