{HEAD ~ A chair} is coupled to {TAIL ~ the shaft} by chair coupling member ; a device carriage is coupled to the shaft by a carriage coupling member ; and a footrest assembly is coupled to the shaft by a footrest coupling member  
is coupled to
{ HEAD ~ A chair } is coupled to { TAIL ~ the shaft } by chair coupling member ; a device carriage is coupled to the shaft by a carriage coupling member ; and a footrest assembly is coupled to the shaft by a footrest coupling member
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH