How It's Made

4:00 AM to 4:30 AM
Saturday 21 September
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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 Quest HD at 4:00 AM, Saturday 21 September. (Subtitles.)
Topics
Education ➝ Science ➝ Factual Topics
Technology