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Poster How Do They Do It?

How Do They Do It? Season 13 Episode 12: Emergency Bridges, Marker Pens 2016

Watch Tv Show Series How Do They Do It? : 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?.

Genre: Documentary
Air Date: 2016-10-31
Season Number: 13
Episodes Number: 12
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