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