{HEAD ~ at least one additional screening layer}, adjacent to {TAIL ~ said first screening layer}, having a predetermined non thickness dimension that is less than said non thickness dimension of said first screening layer 
adjacent to
{ HEAD ~ at least one additional screening layer } , adjacent to { TAIL ~ said first screening layer } , having a predetermined non thickness dimension that is less than said non thickness dimension of said first screening layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH