There were many who blamed the Beatles' end on the machinations of Yoko Ono, the legendary love of John Lennon's life, and on the deviousness of Allen Klein, the band's new manager who was also a favorite of Lennon's, but whom McCartney could not abide. But it wasn't that simple.
The apparatus used in gas welding consists basically of an oxygen source and a fuel gas source (usually cylinders), two pressure regulators and two flexible hoses (one of each for each cylinder), and a torch. This sort of torch can also be used for soldering and brazing.
Hot gas plastic welding is sort of a dead ringer for gas welding, nevertheless it employs lower temperatures. A specific gun produces hot air by using a feed for plastic, which makes the parts to melt and join them together. Its important for the plastic welding materials to hold similar chemistry. The technique is normally utilized for the manufacture of plumbers fittings, big chemical tanks, as well as heat exchangers, etc.