{HEAD ~ The conveying route} comprises {TAIL ~ first rails} and second rails, extending in the different directions and intersecting each other 
comprises
{ HEAD ~ The conveying route } comprises { TAIL ~ first rails } and second rails , extending in the different directions and intersecting each other
HEAD 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