【简答题】说明:大家结合自己情况,尽量多说多录。大家先用手机拍摄好,然后在平台上通过“上传附件”上传。 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 ...
【简答题】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 con...