Season 7 Episodes20
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Ranked #20 of 20 in Season 7•−0.6 vs season avg
How do they design cars that will protect you in a crash; how do they print a bestseller; and how do they transform oil into margarine?
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"Crash Testing, Books Etc, Margarine" is episode 10 of How Do They Do It? season 7. It scored 6.6/10 from 13 votes, ranking #20 of 20 episodes this season (season average 7.2). It aired on July 30, 2010.