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