Definition

A term used in electrical engineering to indicate a type of bonding technique where a metal layer is electrically and mechanically bonded to another metal surface by use of heat or pressure. In another context, it could mean a type of specific welding technique. However, 'helts' is not a standard English word and might be a misspelling. The word 'holds' which is a valid term is used in a variety of contexts and could be the intended word.