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