Guangzhou Lockforming Machinery Co., Ltd. is a large manufacturer of professional production, sales of HVAC duct machine and fire damper equipment.The company has two large production base,with a professional technical team,with the ability to design, develop, manufacture standard and non-standard large equipment. For many years, with its strong technology, continuous improvement, innovation, LOCK becomes the leader in sheet metal processing equipment manufacturing. Main products are auto duct making line,fire damper machine,hydraulic shearer,hydraulic folder,spiral former,plasma cutti...