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About product and suppliers:
        Alibaba.com offers 4,195 hvac duct making machine products. About 25% of these are other metal & metallurgy machinery, 4% are hvac systems & parts, and 1% are punching machines. 

A wide variety of hvac duct making machine options are available to you, such as paid samples, free samples. 

There are 4,195 hvac duct making machine suppliers, mainly located in Asia. The top supplying country is China, which supply 100% of hvac duct making machine respectively. 

Hvac duct making machine products are most popular in South America, Mid East, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 1,381 with ISO9001, 444 with Other, and 3 with ISO14001 certification.