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, it 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. We change electrodes manually . A: Then, can you tell me when do we use a wire feeder? B: For example, we can use it in CO2-shielded welding. The wire feeder can feed the wires for us. A: It sounds so good. B: That’s true. We can save a lot of time. A: By the way, does the wire feeder feed all kinds of wires? B: Of course not. It cannot feed stick-electrodes , but it can feed solid wire and flux-cored wire. A: Now, I know a lot about wire feeder. Thank you so much. B: My pleasure.