primary profile
asendini x määratletud profiili kujutisjoon, mis on eraldatud pinna primaarprofiilist paigutusindeksiga Nif (eriti pika lainepikkusega) profiili F-toimingu poolt, scale limited profile at any position x derived from the primary surface profile by removing the form using an profile F-operation with nesting index Nif, line resulting from the intersection between the primary surface and an ideal plane
