???????, ????????, ????? ?????????????, ????????, ???????.?? ???????????? ????? ??? ????? ??????????? ?? ??? ??????? ???. ???????? «??????????» ?? ???????????? ??? ?? ?????? ??? ????????? ??? ???? ??? ?????????????? ??? «???????» ?? ????????? ?????? ?? ????? ??? ?????????????.This polling can be achieved by a specialised processor in the unit t