Definicja parts interchangeability

Co znaczy PARTS INTERCHANGEABILITY:

Generic term for both groups of interchangeable materials:

Supersession chain FFF Class

Both objects group together interchangeable materials. The materials within a supersession chain are fully or restricted interchangeable, but are different in terms of design, form, function and manufacturing process. All materials in an FFF class are fully interchangeable and are the same in terms of design, form and function (form, fit, function).