X39Cr13 ,S4200C,钢材
SNC631H SNC815H SNCM220H SCM420H SCM435H SCM440H SCM445H SCM822H SMn420H SMn433H SMn438H SMn443H SMn420H SMn443H
易切削结构钢 SUM11 SUM12 SUM21 SUM22 SUM22L SUM23 SUM23L SUM24L SUM25 SUM31 SUM31L SUM32 SUM41 SUM42 SUM43
冷镦钢 SWRCH SWRCH6R SWRCH8R SWRCH10R SWRCH12R SWRCH15R SWRCH17R
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