{HEAD ~ The first and second rod retainers} pivot from {TAIL ~ a lowered position} to a raised position 
pivot from
{ HEAD ~ The first and second rod retainers } pivot from { TAIL ~ a lowered position } to a raised position
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH