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How a combination lock really works

Explore the intricate mechanism inside a combination lock in this detailed animation. The video is available in over 20 languages; you can change the audio track language in the Settings menu. This ...
JaredOwen on MSN

How do these things work?

How Do Clicky Pens Make the ‘Click’ Sound? Explore the mechanics behind the iconic noise made by clicky pens. Discover How a ...