How does a safe, a tennis ball launcher, and a music box really work? Go inside the incredible machinery behind these everyday objects to see their extraordinary inner workings.
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Machines: How They Work - 1x04 Super Ferris Wheel, Jet Ski, Hoover Dam, Traffic Light
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired Mar 19, 2010
- Episode 1x04
- Show special No
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- quasimodo is following Machines: How They Work. Sep 11, 2016
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