is impregnating
Present progressivehe/sheconjugation ofimpregnate.

impregnate

The first step in making EPS is impregnating small beads of polystyrene with an expansion agent, usually pentane.
El primer paso para fabricar el EPS es impregnar pequeñas gotas de poliestireno con un agente de expansión, por lo general, pentano.
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