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  • Sand Screening Machines

    VSI sand making machine working principle/ rock sand crushing machinery- group sand maker - Duration: 4:25. Group 18,804 views

  • |JCOAL

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  • Chapter 82 - Metal Processing and Metal Working Industry

    The metal smelting and refining industry processes metal ores and scrap metal to obtain pure metals. The metal working industries process metals in order to manufacture machine components, machinery, instruments and tools which are needed by other industries .