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