The invention provides an arrangment that automatically sets the rollers of {HEAD ~ the grid} of {TAIL ~ rollers} into self rotation 
of
The invention provides an arrangment that automatically sets the rollers of { HEAD ~ the grid } of { TAIL ~ rollers } into self rotation
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH