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.
The two basic requirements are: a heat-source and a welding rod that aids in fusion of the weld to the parent material. The types of welds used in thermoplastic welding are similar to those in metal welding, namely: o butt welds o fillet welds o lap-joints o edge welds o corner welds.