? ??????? ???????? ????? ??? ????? ?????? ???????, ??? ??????? ??? ???? ?? ????? ??????? ?? ???????? ??????? ?? ??????????:Early tractors used belts or cables wrapped across the flywheel or even a individual belt pulley to power stationary equipment, for instance a threshing machine, buzz observed, silage blower, or stationary baler. Typically, it