1. 

   1 month ago

   Quartz Crystal Military Training Video / Part 2

   TheFringeTheorist82
2. 

   1 month ago

   Military training video about quartz, crystal and electric use of the crystals / Part 1

   TheFringeTheorist82
3. 

   1 year ago

   Designing Gravity: Unraveling the Mystery of Pais's Patents and the Future of Aerospace Propulsion

   brendosapien