A method 1, characterized in that the pattern of {HEAD ~ openings} in {TAIL ~ the planar element} is obtained by stamping the openings in the planar element 
in
A method 1 , characterized in that the pattern of { HEAD ~ openings } in { TAIL ~ the planar element } is obtained by stamping the openings in the planar element
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH