It is noted that the cathode temperature is not so high, {HEAD ~ the temperature} being in {TAIL ~ a range} of the room temperature to about 100 degrees Celsius at most 
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It is noted that the cathode temperature is not so high , { HEAD ~ the temperature } being in { TAIL ~ a range } of the room temperature to about 100 degrees Celsius at most
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH