? ???????? ??? ????? ?? ??? ?????????? ?? ??????????? ??? ?? ???????? ????????? ??????????? ??? ??????????????.?????????? ?????? ????? ??????????? ????????? ???????) ????? ????, ????? ??? ???????????? ????????????? ??? ?????? ??? ???????? ?? ????????????? ?????? ??? ??????? ??? ??? ?????????? ?????????.Study if the h2o degree is influenced by drain