线琴钢丝 70#弹簧 70#弹簧 球墨铸铁QT400-18 QT400-15 QT450-10 QT500-7 QT600-3 QT700-2 QT800-2 QT900-2 ISO1083-400-18 ISO1083-400-15 ISO1083-450-10 ISO1083-500-7 ISO1083-600-3 ISO1083-700-2 ISO1083-800-2 ISO1083-900-2 ASTM-A536-60-40-18 ASTM-A536-60-42-10
ASTM-A536-65-45-12 ASTM-A536-70-50-05 ASTM-A536-80-60-03 ASTM-A536-100-70-03 ASTM-A536-120-90-02 ASTM-A536-F32800 ASTM-A536-F32900 ASTM-A536-F33100 ASTM-A536-F34100 ASTM-A536-F34800 ASTM-A536-F36200 EN1563GJS-400-18 EN1563GJS-400-15 EN1563GJS-450-10 EN1563GJS-500-7 EN1563GJS-600-3 EN1563GJS-700-2 EN1563GJS-800-2 EN1563GJS-900-2 EN1563-JS1020 EN1563-JS1030 EN1563-JS1040 EN1563-JS1050 EN1563-JS1060 EN1563-JS1070 EN1563-JS1080 EN1563-JS1090 JIS-G5502-FCD400-18 JIS-G5502-FCD400-15 JIS-G5502-FCD450-10 JIS-G5502-FCD500-7 JIS-G5502-FCD600-3