How to Make a Periscope ! / Tutorial / DIY

https://www.youtube.com/watch?v=Pb24i2mru7c&feature=youtu.be To do a periscope you need! In today's instructables I'm going to show you the idea of how to make a periscope. Periscope is one of the simplest optical appliances, which can be made at home. It is convenient for watching through...
By: romanursuhack

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