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About product and suppliers:
        Alibaba.com offers 3,193 solid otr products. About 1% of these are mining machinery parts. 

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

There are 3,193 solid otr suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of solid otr respectively. 

Solid otr products are most popular in North America, Mid East, and South America. 

You can ensure product safety by selecting from certified suppliers, including 529 with ISO9001, 275 with Other, and 96 with ISO/TS16949 certification.