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S13 E1231 October 201622 min★ 0.0 TMDB

Emergency Bridges, Marker Pens

How Do They Do It? · Season 13

Season 13

Episode 12 of 20

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Episode overview

How do they build emergency bridges that can take the weight of a tank, make a marker pen that never fades, and design a 200-mph superbike?

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S13 E12 · Emergency Bridges, Marker PensHow Do They Do It?
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