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

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