This part of ISO 17677 establishes a vocabulary of terms and definitions for resistance spot welding, projection welding and seam welding. NOTE In addition to terms used in English and French, two of the three official ISO languages, this part of ISO 17677 gives the equivalent terms in German; these are published under the responsibility of the member body for Germany (DIN). However, only the terms and definitions given in the official languages can be considered as ISO terms and definitions.