The company from the United States, Switzerland of the introduction of full automatic spiral cotton pipe production line, metal lose with high-tech, mechanical automation instead of traditional half mechanization production process, to lose cotton, dust removal, ventilation pipe production, installation to inject the brand-new concept. Machine duct basically has the following characteristics: 1, machine of the production of high quality galvanized duct that don't hurt, galvanized layer was not damaged, prolong the life. 2, specifications unity, size, and to ensure the pipe inner surface standard level off, smooth, easy to clean, and make the material flow fluent. 3, since forming flange can make the pipe material, no longer use Angle steel flange unity, reduce the piping weight 20% more, and therefore, the status of the building can be greatly reduced by ability, and reduced the overall cost of the building. 4, strengthen pipeline, attractive appearance beautiful, structure compact, line is fluent, superior performance, installation exposed the duct, especially for this product. 5, the typical garden form fitting general 3-6 m long, rectangular pipe fitting long 1-1.5 meters, reduce the pieces of the connecting point, make pipe leakage of farming to minimize the extent. 6, mechanization production line of the pipe and fittings and spare parts all have a standard, because the sealing ring is standardization, factory production, so air tightness better.