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