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Ysd-85/1500 Aluminum Inox Caliber 26 Flexible HVAC Air Pipe Spiral Duct Making Machine for Galvanized Steel Round Tube Forming, Find Details and Price about Spiral Tube Machine Spiral Tube Making Machine from Ysd-85/1500 Aluminum Inox Caliber 26 Flexible HVAC Air Pipe Spiral Duct Making Machine for Galvanized Steel Round Tube Forming - Nanjing Shanduan Cnc Machine Tool Co., Ltd.