The objective of the invention is to enable {HEAD ~ the metal sheet} to be fixed in {TAIL ~ a simple manner} 
to be fixed in
The objective of the invention is to enable { HEAD ~ the metal sheet } to be fixed in { TAIL ~ a simple manner }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL