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About product and suppliers:
        Alibaba.com offers 7,592 duct manufacturing machines products. About 40% of these are pipe making machinery, 20% are other metal & metallurgy machinery, and 2% are plastic extruders. 

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

There are 7,604 duct manufacturing machines suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and India, which supply 99%, 1%, and 1% of duct manufacturing machines respectively. 

Duct manufacturing machines products are most popular in Southeast Asia, Domestic Market, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 2,903 with ISO9001, 540 with Other, and 53 with OHSAS18001 certification.