28.2 Match the two parts to make eleven correct sentences about welding techniques. You will need to use some parts more than once. Look at B opposite to help you. 1 Shielded metal arc welding uses 2 Gas welding uses 3 Gas metal arc welding uses 4 Gas tungsten arc welding uses a burning gas. b a consumable electrode. c a non-consumable electrode. d a separate welding rod which is not an electrode. e a special coating on the welding rod which produces a shielding gas. f a separate gas supply, blown onto the weld as a shielding gas. g a shielding gas generated by burned oxyfuel. h a gas whose purpose is to increase the temperature of the welding process.