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About product and suppliers:
        Alibaba.com offers 11,287 duct manufacturing machines products. About 51% of these are pipe making machinery, 17% are other metal & metallurgy machinery, and 1% are plastic extruders. 

A wide variety of duct manufacturing machines options are available to you, such as iron, carbon steel, and aluminum. You can also choose from pipe molding machine, pipe production line, and pipe welding machine. As well as from drain pipe, energy supply pipe. And whether duct manufacturing machines is free samples, or paid samples. 

There are 11,300 duct manufacturing machines suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Turkey, which supply 99%, 1%, and 1% of duct manufacturing machines respectively. 

Duct manufacturing machines products are most popular in Southeast Asia, North America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 4,275 with ISO9001, 592 with Other, and 54 with ISO14001 certification.