It is a bismuth-based eutectic fusible alloy made of four low-melting metals such as bismuth, tin, lead, and indium, without cadmium. It has a low melting point, can be melted in hot water, is easy to recycle and can be reused many times.
Small Gaseous Air Separation Plant (ASP) combines air compression, adsorption purification and cryogenic distillation. They produce oxygen up to 99.6% purity, as well as gaseous nitrogen and liquid oxygen, nitrogen and argon to refill backup liquid tanks