1J21棒1J22坡莫合金卷 SUYP-1 DT4E电工纯铁
1J38 1J41软磁合金/..
荣腾1J12 1J13 1J..
1J16 1J17软磁材料铁..
1J21棒1J22坡莫合金卷..
1J20软磁合金/坡莫合金进..
45CrNiMoVA合金结构..