9 Fire-extinguishing apparatus; fire-fighting vehicles by land, air and water of each kind, namely, fire boats, fire-fighting aircraft, fire engines, fire-fighting helicopters; fire-extinguishers; Jet pipes for fire-extinguishing purposes, namely, fire hoses; Fire-extinguishing systems comprised of pick-up heads for fire-extinguishing purposes for picking up water while flying over waters; Fire extinguishing apparatus, namely, tanks and tanks of modular construction for fire-extinguishing compositions, namely, water, which may be used as components of fire-fighting vehicles, aircraft and equipment; Modularly constructed fire-extinguishing device for fire-fighting vehicles by land, water and air, namely, fire extinguishing apparatus in the form of tanks for fire-extinguishing compositions and for use in picking up water and dumping water