In the event that {HEAD ~ the sensed temperature} exceeds {TAIL ~ a dangerously high level}, the circuit energizes an audible alarm 
exceeds
In the event that { HEAD ~ the sensed temperature } exceeds { TAIL ~ a dangerously high level } , the circuit energizes an audible alarm
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH