Portable and go-cart fire extinguisher is featured by simple structure, easy and flexible operation, high performance, and intermittent or constant water spraying. It is used to put out the initial fire of oils, flammable liquids, organic solids, gases, and electrical equipment. It is really a necessary fire extinguishing equipment for plants,mines,institutions,schools,hotels,office buildings,oil pump rooms,gas stations,oil paint rooms,vehicles,ships,and other places that are easy to catch fire. co? automatic fire extinguishing system is a kind of gas fire fighting equipment that is widely used at present. Its fire retardant is featured by low toxicity, no damage to the equipment, and excellent insulating property. co? automatic fire extinguishing system can sharply reduce the temperature thanks to its dry ice, so it is especially suitable for fire protection of solid surfaces in libraries,archives and bill rooms, as well as for fire protection of cotton, wool, textile and paper. Also, it is suitable for B-type, C-type and electrical fire protection, but not suitable for fire protection of precision instrument and equipment. HFC227ea fire extinguishing system is widely used in China. The gas retardant of HFC227ea doesnt conduct electricity or damage the ozonosphere, and at the normal temperature, it can be liquefied with high pressure. HFC-23 (molecular formula CHF3, formal name fluoroform) gas fire extinguishing system is a high-performance and secure fire extinguishing system that is absolutely nontoxic.