{HEAD ~ An apparatus} 12 wherein {TAIL ~ the electromagnetic radiation producing means} includes means for producing microwaves 
wherein
{ HEAD ~ An apparatus } 12 wherein { TAIL ~ the electromagnetic radiation producing means } includes means for producing microwaves
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH