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