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About product and suppliers:
        Alibaba.com offers 1,527 quality price ratio products. About 2% of these are gearboxes, 1% are speed reducers. 

A wide variety of quality price ratio options are available to you, such as worm, planetary, and helical. You can also choose from free samples, paid samples. 

There are 1,520 quality price ratio suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Japan, which supply 99%, 1%, and 1% of quality price ratio respectively. 

Quality price ratio products are most popular in North America, Southeast Asia, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 469 with ISO9001, 358 with Other, and 110 with ISO22000 certification.