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