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Explanation: I understand that the different elements - etapa de granulación, compresión, blisteado - refer to stages in the production process. After searching a bit, I found out that apparently 'blistering' and 'blistering stage' refer to medical conditions in burns, cold sores etc.
As you mentioned the granule part, I think these are production stages - first, the the ingredients are mixed and formed into granules, then the final shape (Tablets, Coated Tablets, Hard Capsules, Soft Capsules, etc.) is otained by compressing the ingredients, and then the tables, capsules or whatever are grouped and packaged in blisters.