... : High quality welding.4. Certificate: ISO 9001: 20085.Application:Melt furnaces, thermal insulation stoves, arc furnace, calcium carbide furnace etc cooling ... oils, vacuum furnaces, central air conditioning, ground-source heat pumps, air compressors, injection molding machines, engine blocks, glass melting kilns, boiler steam ... all over the world. 2012 new closed cooling tower for melting furnace