{HEAD ~ The articulated trackway sections} permit engagement of a carrier and {TAIL ~ subsequent pulling} of the carrier from the descending elevator 
permit
{ HEAD ~ The articulated trackway sections } permit engagement of a carrier and { TAIL ~ subsequent pulling } of the carrier from the descending elevator
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH