How It's Made – S01 E04 : Hearing Aids, 3-D Puzzles, Rubber Mats, Toilets

How It's Made
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This episode demonstrates the production processes for hearing aids, 3-D puzzles, rubber mats and toilets, and shows how each is made.

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Cast

Lynne Adams
as Narrator (voice)
June Wallack
as Narrator (voice)

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