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