Sagging Sewage Technique Traces-- Filth modifications can create your drain line to sag. When this occurs, the part which includes sunk accumulates paper and squander leading to a blockage.??????? ????? ????????? ?? ????? ???????, ?????????? ??? ??????????? ??????, ??????? ??? ?? ????????? ??? ??? ???????? ??????????.?????? ??? ??? ?????????, ?????