Sagging Sewage Technique Traces-- Dust alterations can build your drain line to sag. When this occurs, the portion which has sunk accumulates paper as well as waste bringing about a blockage.?????????? ??????????? ??? ????????????? ???? ???? ???????? (– ????? ??????????????? ??? ?? ?????????? ??? ?? ??????? ??? ??????? ??? ???? ??????.???????????