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