美国易切削钢部分：110811091110111611171118111911321137113911401141114411511146121112121213121512L1412L1312L151152…….美国部分弹簧钢和轴承钢:A228A227A679A229A230A231A232A878A313A631A-286A5698A5699X-750LNCONE7181050A6821074109564559254521005195K195261070M5160A4854118H4320H4720H4820H8617H5120H8620H9310H3310N43204712482086209310……)