Extinguishing System, Manual : A system of fixed fire protective apparatus for discharging a fire-extinguishing or -suppressing medium or media, and initiating other action as arranged by manual operation. (BS 4422(4))
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}