The combustion form of rich flame is part-premixed combustion and lean flame is premixed combustion.

浓火焰燃烧形式为部分预混燃烧，淡火焰的燃烧形式为全预混燃烧。

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The combustion form of rich flame is part-premixed combustion and lean flame is premixed combustion.

浓火焰燃烧形式为部分预混燃烧，淡火焰的燃烧形式为全预混燃烧。

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