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