{HEAD ~ Each car} 14 comprises {TAIL ~ a hanger arm} 20 fixed to a carriage 22 supporting one or two grips 24, biased to the closed position by springs 26 
{ HEAD ~ Each car } 14 comprises { TAIL ~ a hanger arm } 20 fixed to a carriage 22 supporting one or two grips 24 , biased to the closed position by springs 26
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL 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