How Do They Do It?
Road Rollers/Mobile Phones
Season 12 Episode 6 of 20
Investigating how heavy duty road rollers are built, and revealing how mobile phones are manufactured with the care and precision of a Swiss watch
How Do They Do It? airs on Discovery Channel HD at 4:30 PM, Friday 29 May. (Subtitles.)
Learn more about How Do They Do It? and other education/science/factual topics on our factual page
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