{HEAD ~ a plurality} of {TAIL ~ movable bows} connected to said cover, each movable bow having a guide at each of its opposed ends, 
of
{ HEAD ~ a plurality } of { TAIL ~ movable bows } connected to said cover , each movable bow having a guide at each of its opposed ends ,
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH