... water steam, hot air and life water through heat exchange Heat-conduction oil boiler is a kind of DC-special ... extrusion, Vulcanization 4. Fiber: synthesis, melting, Spinning, Molded, Solid heat, drying extension5. Carbon: melting asphalt, impregnation, mixing, molding6. ... 8. Metal: pickling, electroplating, painting package, oil bath, heat treatment9. Painting package: painting bake dry, car, plane, ...