Three-Horse Hitch 2 : A team of three large draft horses formerly used to pull steam fire engines, ladder trucks, and combination hose and chemical apparatus
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}