1 In many decks, the queen of clubs holds a flower. She is thus known as the flower queen, though this design element is among the most variable; the Bicycle Poker deck depicts all queens with a flower styled according to their suit.  2 2 cards are also known as deuces.  3 cards are also known as treys.
Jupiterimages/Photos.com/Getty Images. Spray welding is a form of Metal Inert Gas (MIG) welding, or as it's also known, Gas Metal Arc Welding (GMAW). Spray welding uses a welder with a wire feeder and regulated inert gas that is a mixture of argon and carbon dioxide. Spray welding is for transferring lots of weld at once in the flat and horizontal positions.
Hot gas welding, also known as hot air welding, is a plastic welding technique using heat. A specially designed heat gun, called a hot air welder, produces a jet of hot air that softens both the parts to be joined and a plastic filler rod, all of which must be of the same or a very similar plastic. (Welding PVC to acrylic is an exception to this rule.)