Jack 2 : (1) A portable device used to lift heavy objects by means of force applied with a lever, screw, or hydraulic press. See also: Outrigger Jack. (2) A Screw Or Hydraulic Jack Used In Rescues
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}