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About product and suppliers:
        Alibaba.com offers 6,195 industry ratio products. About 8% of these are gearboxes, 5% are speed reducers, and 1% are ac motor. 

A wide variety of industry ratio options are available to you, such as worm, planetary, and bevel / miter. You can also choose from free samples, paid samples. 

There are 6,170 industry ratio suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and United States, which supply 96%, 1%, and 1% of industry ratio respectively. 

Industry ratio products are most popular in North America, Domestic Market, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 1,646 with ISO9001, 890 with Other, and 188 with ISO/TS16949 certification.