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特钢、不锈钢、有色金属,SAE1020,S20C,CK22,C22,SAE1045,S45
SAE1020 S20C;CK22 C22 SAE1045 S45;S45C C45ECK45 SUJ2;40CR 100CR6 65SI7;SAE5120 SCR420 20CR4;SAE5140 SCR44041CR4;Y15PB 12L14 1215;20CRMO 30CRMO 42CR..
SAE1020 S20C; CK22 C22 SAE1045 S45; S45C C45E CK45 SUJ2; 40CR 100CR6 65SI7; SAE5120 SCR420 20CR4; SAE5140 SCR440 41CR4; Y15PB 12L14 1215; 20CRMO 30..