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