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