Vacuum pump with NO moving parts
31:29
DON'T TRY THIS AT HOME!
33:12
almacén de microondas1
20:18
Sprengel Vacuum Pump: The most efficient vacuum pump ever?
35:18
Distilling ALCOHOL With Our New Reflux Still!
21:23
NASA'S Plutonium Problem
22:02
Forging My Own Currency
25:34
Cómo hacer pintura de refrigeración por infrarrojos (aire acondicionado sin electricidad)
41:52