{HEAD ~ means} for conducting said primary energy to {TAIL ~ said source} of microwave energy; and 
{ HEAD ~ means } for conducting said primary energy to { TAIL ~ said source } of microwave energy ; and
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH