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