??????? ????????? ?? ???????? ?? ????? ? ?????????? ?? ????????? ?? ??????? ????? *??????? ???????????? ????????????? ???? ????? ? ????????????? ????????? ??????????? ? ???, ??? ? ??? ?????? ? ?????? ?????????????? ???????, ??????? ????????? ?????????? ??????.A relatively new advancement would be the alternative of wheels or steel crawler-kind trac