?? ?? ???????? ??? ?????? ??????????? ??? ??????? ??? ??????????? ?????????? ??? ???????? ????????? ??????????, ???? ????? ??????? ?? ????????? ? ??????? ??????????? ?? ??????, ???? ?? ??????????? ?? ???????? ? ???? ??? ??????????? ??? ?? ????? ????? ????.Pondering just how to cope with blocked sewage procedure traces? A sewage system line is essen