{HEAD ~ The thin flat plate} has two flat surfaces substantially encapsulated by {TAIL ~ a refractory wedge} 
{ HEAD ~ The thin flat plate } has two flat surfaces substantially encapsulated by { TAIL ~ a refractory wedge }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL