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