duct auto making line fixed welding seam filling ...
Duct using straight welding machine, longititue welding ... Auto Duct Production Line. Auto Duct Production Line 2; Auto Duct Production Line 3 ... straight seam welding machine is a gerneral automatic welding machine which can complete the welding of thin cylinder,cone tank, plate and square box with one open mouth with thickness 0.5-5mm characterized good-quality, high efficiency and ...
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