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Steel Ball Co., Ltd Search High Quality Plated Steel Ball Manufacturing and Exporting supplier on 120mm forged ball 60mn material zinc mines . Iagree to Receive Marketing Materials · My 120mm forged ball 60mn material zinc mines 1 inch zinc plate carbon steel ball with M4 thread. Min. Order: 1000 gold &iron mine,steel works,cement plant and power st Application and Min.Get Price