Last Updated
：2025/11/21
hot bulb
（ plural ）
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An internal combustion engine in which the fuel is ignited by hot, compressed gas rather than a spark
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hot bulb
The vintage tractor is powered by a hot bulb, a type of internal combustion engine that ignites fuel with hot, compressed gas rather than a spark.
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The vintage tractor is powered by a hot bulb, a type of internal combustion engine that ignites fuel with hot, compressed gas rather than a spark.
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