"combustion triangle" meaning in English

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  "etymology_text": "From combustion + triangle. From the three elements necessary to sustain combustion, therefore being a metaphorical \"triangle\" (though more like a tripod, having three supporting elements sustaining combustion).",
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  "pos": "noun",
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        "Synonym of fire triangle"
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  "word": "combustion triangle"
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      "form": "combustion triangles",
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  "word": "combustion triangle"
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