At least a portion of the member is in {HEAD ~ thermal contact} with {TAIL ~ the opening} and is made of a material reactive with electromagnetic energy 
with
At least a portion of the member is in { HEAD ~ thermal contact } with { TAIL ~ the opening } and is made of a material reactive with electromagnetic energy
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH