Portable Fire Extinguisher 3 : A portable device, carried or on wheels and operated by hand, containing an extinguishing agent that can be expelled under pressure for the purpose of suppressing or extinguishing fire
NFPA 502 Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2004 ed. (Std: Road Tunnel, Brdg and Other Limited Access Highways - Amer) {327 NFC}