Description: group of products which fulfill a similar need for a market segment or market as a whole; Name: Type of the product
Description: Characteristic to differentiate between different products of a product family or special variants; Name: Product type
Description: a specific design within the context of a type, which is generally characterized by its dimensions. A construction can comprise several design (variants), which generally vary in terms of mechanical details; Name: Construction form of the seal surface, connection, muff A1