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????? ????? ???? ????? ???????? PVC 1. ????? ?????? ??????????? (1) ?????? ???? ???????? ??? ????? ????? ??????? ??????? ? ???? ??????? ????? ???? ??????? ?????? ? ?? ???? ????? ?????? ?? ???? ??????? ????? ??? ??? ???? ?? ??????????. ??? ?????? ????? ? ??? ????? ???? ??????? ?????? ? ???????? ????? ??????? ?????? ???????? ??????? ?????. ???? ?? ????? ????? ??? ??? ???? ????? ????. (2) ??? ??????? ???????? ????????? ??? ??????? ? ?? ??????? ???? ??? ??????? ???????? ???? ??? ?????? ?? ???? ????? ??????? ???? ? ???? ????? ????? ??? ??????? ????????. ??? ??? ? ?? ?????? ???? ?????? ?????? ????? ? ?? ???? ?????? ?? ???? ????? ??????? ? ??? ?????? ?????? ??? ?????? ? ???? ??? ???? ???????? ??????. (3) ???? ??????? ????? ????? ??????? ? ??? ????? ?????? ??? ?????? ??? ???? ????? ????????. ?? ????? ???? ? ??? ??? ?????? ?? ???? ?? ?????? ?? ???? 3 ????? ? ??? ???????? ????? ??? ?????. 2. ???????? ?????? PVC ???? ??? ?????? ??????? ??????? ??????? ???? ????? ??? ?????? ???? ???? ?????. ????? ??????? ??????? ? ?? ????? ????? ????? ??? ??????? ???? (??? ???? ?????? ? ?? ????? ????? ??? ????? ?????? ??? ???? α
