A: Do you know this welding equipment ? B: Yes. It is a wire feeder. A: Could you say more about it? B: Sure. This is the handle . This is the wire reel . This is the wire drive-roll . This is the controlling panel . This is the gas passage . This is the current cable . A: De we have to use it in welding? B: Well, to use it or not depends on the welding process . A: Shall we use it in manual arc welding ? B: No. In manual arc welding, we don’t use the wire feeder to feed the electrode, because the stick-electrode cannot be curled up . When the stick-electrode is used up , we have to change a new one manually . A: Then, can you tell me in what welding processes shall we use it? B: Certainly. We can use it in automatic or semi-automatic welding processes. For example, we can use it in gas-shielded metal-arc welding , flux-cored arc-welding , submerged-arc welding and robot welding . In these welding processes, the wire feeder can feed the wires automatically and continuously. A: It sounds so good. B: That’s true. We can save a lot of time, because we don’t need to change the wires manually. A: By the way, does the wire feeder feed all kinds of wires? B: Of course not. It cannot feed stick-electrodes , because they cannot be curled up. But it can feed solid wire and flux-cored wire, because they can be curled up. A: Now, I know a lot about wire feeder. Thank you so much. B: My pleasure.