Analysis of the Key Points of the Secondary Curing Process for No. 1 Material

A pellet mill recently arrived at our company, and the manufacturer's people talked about many things, one of which was secondary curing. I did not catch it. Does anyone know about this and can give some guidance?
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I feel it should be that during pelleting there is a high-temperature and high-pressure process, which counts as a kind of curing. Or perhaps conditioning is done twice?
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Secondary pelleting is secondary curing.
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I also want to know. Who can explain it more clearly