{HEAD ~ A retractable cover system} for a tipper trailer body of a truck includes a cover for the top of the trailer body , and {TAIL ~ a winder pulley} for controlling the movement of the cover across the top of the trailer body  
includes
{ HEAD ~ A retractable cover system } for a tipper trailer body of a truck includes a cover for the top of the trailer body , and { TAIL ~ a winder pulley } for controlling the movement of the cover across the top of the trailer body
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH