{TAIL ~ The profiles} are initially provided in {HEAD ~ the fully engaged condition} within an elongate, longitudinally cut tube 
{ TAIL ~ The profiles } are initially provided in { HEAD ~ the fully engaged condition } within an elongate , longitudinally cut tube
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH