Complex sentence: An alternative form of the same type of bale is placed on a pair of rollers on a turntable mounted on the three-point linkage of a tractor, and spun about two axes while being wrapped in several layers of cling-wrap plastic film.
Split into simpler sentences: An alternative form of wrapping places the same type of bale on a pair of rollers on a turntable mounted on the three-point linkage of a tractor. It is then spun about two axes while being wrapped in several layers of cling-wrap plastic film.