{HEAD ~ The ends} of {TAIL ~ the ribbon} are provided with hook shaped retainers for engagement below parts of a waler and tension elements for fixing the hook strap 
of
{ HEAD ~ The ends } of { TAIL ~ the ribbon } are provided with hook shaped retainers for engagement below parts of a waler and tension elements for fixing the hook strap
HEAD HEAD HEAD HEAD HEAD HEAD 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