Prosés nyieun pipa seamless stainless steel: 1, steelmaking → 2, rolling baja buleud → 3, perforation (annealing) → 4, tiis digambar → 5, rolling tiis (annealing, demagnetization, pickling, beberesih) → 6, témbok polishing → 7, polishing témbok luar → 8, tekanan hawa ...
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