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Specifications 1.Standard: GB/T 6081-2001 2.PCD:50/75/50/100/125mm 3.material:M2/M35/SKH51/SKH55 4.module:m1~m3.5 Material Introduction: A. W6Mo5Cr4V2 (GB) M2( ASTM), S6-5-2(DIN), SKH51(JIS) chemical ...