{TAIL ~ An inclined ramp} is located on the loading station; {HEAD ~ a carrier} is movably mounted on the ramp so as to be capable of being elevated from adjacent to the lower end of the ramp to adjacent to the upper end of the ramp 
{ TAIL ~ An inclined ramp } is located on the loading station ; { HEAD ~ a carrier } is movably mounted on the ramp so as to be capable of being elevated from adjacent to the lower end of the ramp to adjacent to the upper end of the ramp
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH