... hot water steam, hot air and life water through heat exchange Heat-conduction oil boiler is a kind of DC-special ... to boiler through system pipe with the rest heat avoiding condensation of steam boiler and heat-losing of the boiler ... extrusion, Vulcanization 4. Fiber: synthesis, melting, Spinning, Molded, Solid heat, drying extension5. Carbon: melting asphalt, impregnation, mixing, molding6. Printing ...