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