A foot bar support assembly movably carried by {HEAD ~ each} of {TAIL ~ the outwardly open slots} supports the foot bar 
of
A foot bar support assembly movably carried by { HEAD ~ each } of { TAIL ~ the outwardly open slots } supports the foot bar
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH