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Watch How Do They Do It? Season 16 Episode 9 Online | Available in HD on OSN+

How Do They Do It?

هاو دو ذاي دو إت؟

2019

22m

E9 • Hearing Aids, Trains

حلقة 9 • أجهزة السمع والقطارات

Hearing aids are made that connect wirelessly to phones, TVs and stereos.

Factual • Documentary

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