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