Pattern 3 : Model of a part which is to be made by casting. Must be bigger than the required size to allow for the molten metal to shrink, due to cooling, after it solidifies
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}