Anti-Two-Block Cutout : A device that is activated as the crane hook block is about to hit the boom head and prevents any further upward movement of the hook block
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}