| 摘要 |
a burner plate on which an air- fuel mixture is ignited; a temperature sensor which generates an output voltage representative of the air-fuel ratio in response to the combustion of the fuel gas, a combustion sensor for sensing the rate of combustion of the burner plate; and a safety circuit to compare the output of the sensors and to stop the combustion on the burner plate in response to the output of the temperature sensor being outside conditions determined by the output of the combustion sensor.
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