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