Applies to the fire that occurs in the cotton, cloth, the papermaking raw material warehouse, as well as wheat-straw stack in the countryside, the dark fire in haystack and so on Features of the product: ² To stamping out the invisible fire inside of haystack to prevent the fire again. ² The water curtain wall spurted out by the Fire-Fighting Water Jet Spear can rapidly separate the people from the fire and toxic gas thus protecting people and the fire fighters.