???, ??????????? ?????????? ??????????? ?????????????????????? ??????????????? ?????? ? ????????, ??????? ????????? «??????» ? ?????? ??????????:??? ???? ?????? ????? ?? ????? ????????? ???????????, ????????? ? ????? ????????? ?? ??????????????, ?? ?? ??????? ?? ??? ????? ????? ????????.A bulldozer is usually a track-kind tractor having a blade a