china manufacturer 70mm forged steel grinding balls for ball mill
3 inch Forged steel ball mill grinding media balls for mining TSF75 Taishan Products Made In China, China Manufacturer. 3 inch Forged steel ball mill grinding media balls for mining Description process forged 45# steel,60Mn steel,65Mn steel,B2 steel,B3 steel,B6 steel. hardness 5068HRC 20mm to 150mm treatment .
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