https://www.youtube.com/c/GizemliBilgilerTv?sub_confirmation=1 This fascinating video shows how the Mason & Hamlin company makes its pianos. For more information, visit .\r<br>\r<br>The manufacturing of bulletproof vests and how important they are to the police force.\r<br>\r<br>A segment on how carbon fiber cellos are made. Part 1 of 2.\r<br>\r<br>how its made ball bearings.\r<br>\r<br>From the show How its Made on Discovery Channel This Episode: Holograms.
