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G11190216M441141材料G11410ASTM1116易切削钢棒C1211B1113
C1211 Y20MN B1113 易车铁 Y17 Y20 Y13PB Y11PB Y1CR13易切削钢
Y1CR15易切削钢C1211 B1113易车铁440F B1143 B1119 Y51MN sus416
B1110C1211易切削钢Y1CR15G11110易车铁B1119B1113冷拉光圆
B1110 C1211易切削钢 Y1CR15 G11110 易车铁 B1119 B1113冷拉光圆
ASTM1109易切削钢10S20实心棒38SMn28中碳易车铁C1211 B1113圆钢
供应SAE4340 40CrNi SAE440C C60E 10S20 B1113 C1211 易切削钢