How It's Made

6:30 AM to 7:00 AM
Friday 1 August
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Retractable Ballpoint Pens/Solar Salt/Tubas

Season 14 Episode 13 of 13

The manufacture of retractable ballpoint pens, solar salt and tubas

How It's Made airs on Discovery Channel at 6:30 AM, Friday 1 August. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Technology