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煅, a phono-semantic compound, combines the fire radical 火 (indicating fire, heat, or burning) with the phonetic element 段. It refers to the process of applying intense heat to substances, calcining or heating minerals until they undergo physical or chemical change, and is thus linked to metallurgy and chemistry. Though interchangeable with similar metalworking characters, 煅 is mainly confined to technical contexts, including traditional Chinese medicine preparation, metallurgy, and industrial heating procedures requiring controlled high temperatures.
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