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About product and suppliers:
        Alibaba.com offers 557,345 screw machine products. About 3% of these are plastic extruders, 1% are capping machines, and 1% are other metal & metallurgy machinery. 

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

There are 555,949 screw machine suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of screw machine respectively. 

Screw machine products are most popular in Domestic Market, Southeast Asia, and North America. 

You can ensure product safety by selecting from certified suppliers, including 159,338 with ISO9001, 90,489 with Other, and 14,890 with ISO14001 certification.