Rectangular duct making machine includes beading machine, shearing machine, pittsburgh lock forming machine, TDF flange forming machine, folding machine etc. These machines play their own roles when producing square duct, such as beading, cutting, pittsburgh locking, TDF flange forming, folding the thin plates. Some of them are combined to form an auto duct production line, more cost-effective. And the machines can be moved anytime and anywhere, more convenient.
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