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