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