汉英词典
Chinese-English Dictionary
MEANING OF 回火
回火
to temper (iron) / to flare back / flareback (in a gas burner) / (of an engine) to backfire
烧炭 自燃 助燃
①把淬火后的工件加热（不超过临界温度），然后冷却，使能保持一定的硬度，增加韧性。也叫配火。②氧炔吹管等的火焰向反方向燃烧。
回 huí 火 huǒ
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