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About product and suppliers:
        Alibaba.com offers 9,746 gear ratios products. About 26% of these are speed reducers, 19% are gearboxes. 

A wide variety of gear ratios options are available to you, such as planetary, harmonic, and worm. You can also choose from free samples, paid samples. 

There are 9,776 gear ratios suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 97%, 1%, and 1% of gear ratios respectively. 

Gear ratios products are most popular in Southeast Asia, North America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 3,317 with ISO9001, 1,273 with Other, and 553 with ISO14001 certification.