Report copyright - isovac high-perm 250-50 A€¦ · GOST 21427.2 ASTM A677 AISI IS648 GB/T2521.1 Material No. Abbreviation isovac HP 250-50 A 1.0891 M250-50A M250-50A 5 50A250 - - - - 50W250 Grade
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