{HEAD ~ Spacers} maintain {TAIL ~ the plate spacing} so that the plate second portions do not overlap 
maintain
{ HEAD ~ Spacers } maintain { TAIL ~ the plate spacing } so that the plate second portions do not overlap
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH