{TAIL ~ One or more metal tubes} passes through the holes of {HEAD ~ the plates} to position the plates with their second portions forming a substantially continuous sheet 
{ TAIL ~ One or more metal tubes } passes through the holes of { HEAD ~ the plates } to position the plates with their second portions forming a substantially continuous sheet
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH