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In the manufacture of pharmaceuticals, encapsulation refers to a range of dosage forms--techniques used to enclose medicines--in a relatively stable shell known as a capsule, allowing them to, for example, be taken orally or be used as suppositories. The two main types of capsules are:
* Hard-shelled capsules, which contain dry, powdered ingredients or miniature pellets made by e.g. processes of extrusion or spheronization.

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