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