technicians. huge fuel tanks were produced using a technique called friction star welding it softens the metal edges by friction to create smooth and durable seals it's a solid state process that doesn't melt the material it works the temperatures as low as $500.00 degrees celsius compared to the more than 2000 degrees for the usual arc welding technique. though i didn't know even what. the new materials review mr contain a large amount of lithium. and mostly i'm cannot be joined using arc welding. meters i know melting temperature so it would quickly evaporate yes well for. the lightweight alimony i'm libyan tanks are part of the engine that powers the upper stage of the rocket. that engine has been named vinci in honor of the great inventor doctors leonardo da vinci it special feature is that it can be restarted 5