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S-H HONG, "Life and Mechanical Properties of Hot Former Die for Bearing Race using P/M High Speed Steel", Department of Powder Materials Research, Korea Institute of Materials Science, Korea Institute of Machinery and Mater., 531 Changwondaero, Changwon, Gyeongnam, 641-831, Korea, pp. 367-371, 2007.
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http://www.hmk.hitachi-metals.com
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http://www.millroll.com
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http://meisterlab.co.kr/
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