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???? ?????? ??? ????? ?????????? ??????? ??????? ?????????? ??????? ????? ???????? ???????? ??? ?? ???? ?? 40 ????? ? ??? ???? ????? ????? ????? - ???? ???????? ???????? ??????? ???????? ?????????.
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????? Wanlong Chemical ?? ??? 1989 ? ??? ????? ?? ???? ??????? ??????? ???? ?????? ?? ?????? ?? ?????. ??? ?????? ?????? ???? ?????? ??????? ?? ??? ?????? ??? 25000 ?? ?? ?????? ?????? ?? ??????. ????? ??? ??? ? ???? ????? ?????? ????? ???????? (???????? ?????? 135 ? ?????? ???????? 160: 1 (10GN)) ????????? (PBA ? PTBA ? MPBA).
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