A: What is an assembly exactly?
B: Assembly is a component made of more than one part.
A: What about A-Surface?
B: A-Surface is the surface of a product that a customer can see.
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: Self-lubricated bushing is very popular in western countries.
B: It's gaining market in China as well.
5.Detailed drawing 零件图
A: What is a detailed drawing?
B: It's a drawing of an individual part or component.