1.Assembly 总成 A: What is an assembly exactly? B: Assembly is a component made of more than one part. A：总成到底是什么？ B：总成是由一个以上零件组成的部件。 2.A-Surface A级表面 A: What about A-Surface? B: A-Surface is the surface of a product that a customer can see. A：那A级表面又是什么呢？ B：A级表面是指顾客能看到的产品表面。 3.B-Surface B级表面 A: They also talk about B-Surface. What is that? B: B-Surface is the surface of a component that you can t see in the normal service condition. A：他们还说到B级表面，那是什么？ B：B级表面是在正常使用状态下看不到的部件表面。 4.Bushing 轴套 A: Self-lubricated bushing is very popular in western countries. B: It s gaining market in China as well. A：自动润滑轴套在西方国家很流行。 B：它也进入了中国市场。 5.Detailed drawing 零件图 A: What is a detailed drawing? B: It s a drawing of an individual part or component. A：零件图指什么？ B：是指单个零部件的图纸。