A fire-fighting system in which multiple water discharge lines each have associated with them a foam concentrate delivery line where each of the foam concentrate delivery lines are supplied from a foam concentrate tank by way of a positive displacement pump having the capability of having its flow rate adjusted. The decorative plate is bored with at least one insert groove and each vase has its outer wall provided with an engage block to be fitted with the insert groove to fix the vase on the decorative plate. A method is also disclosed for coating the exposed surface of the decorative layer between injection of the backing and outer layers to impart a desired visual effect or repair the surface. The deactivated catalyst is contacted with the fluid reactivating agent under pressure and temperature conditions such that the fluid reactivating agent is dense enough to effectively dissolve the fouling agents and any reaction products of the fouling agents and the reactivating agent. It is thus possible to suppress overlapping of dots of a plurality of color components and to thereby improve color reproduction of the target color component while suppressing poor color reproduction and cockling. A filter circuit, also implemented with a programmable device, is coupled to the bus interface circuit and to the bus processing block.