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