{HEAD ~ The carrier} and the vehicle are provided with {TAIL ~ structures} which engage one another as the vehicle is so moved so that the vehicle serves to move the carrier along the ramp 
{ HEAD ~ The carrier } and the vehicle are provided with { TAIL ~ structures } which engage one another as the vehicle is so moved so that the vehicle serves to move the carrier along the ramp
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH