What are the advantages of spiral duct machines and square duct machines?
1) Good sealing quality. The spiral duct has the characters of no welding, airproof and watertighter. It is the best choice for ventilation and bulk material. 2) Good strength and rigidity. Spiral duct machine adopts strap coiler, the structure is strong to bear strong pressure without distortion. 3) Spiral duct machine features less resistance in ventilation, low noise, stable structure and its performance is better than square duct machine. 4) The installation of the spiral duct machine is with little jointpoints and long continuous length for easy installation. 5) The spiral duct machine is a coherent unity with beautiful outlook which make it a top grade machine.
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