Refine Results type Twitter 1 - 2 of 2 Search Results for Glass > Twitter Products (57) Twitter (2) It’s all in the gears- these robots have gears made of... glass? Check out NASA's newly geared robots:… https://t.co/Sj3Jj2jDxE Four-stroke engine with glass cylinder is a 2400 RPM piece of art http://t.co/gnhKPiYOG7