易切削钢Y12PB Y15PB Y40MN
易切削钢ISO20 ISOP..
易切削钢S250PB S25..
易切削钢35MF6 18MF5
易切削钢Y12PB Y15P..
易切削钢Y30 Y35 Y40
易切削钢Y12 Y15 Y20