???? ???? ???????? ????? ???????? ?? ???? ????? ???????? ???????

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