The insulation system includes insulating boards which are suspended beneath roof panels by {HEAD ~ flexible sheets} of {TAIL ~ material} 
of
The insulation system includes insulating boards which are suspended beneath roof panels by { HEAD ~ flexible sheets } of { TAIL ~ material }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL