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