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admin2026-01-04T13:38:30+08:00 51CrV4 Steel | DIN 1.8159 | AISI 6150 Spring SteelEngineering Alloy steel
admin2026-01-04T13:39:14+08:00 EN19+QT Steel | 709M40 round steel-BS970 StandardEngineering Alloy steel
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