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Sofa mattress spring steel wire
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Standard: DIN 17223-1, EN10270-1, JIS G 3206, JIS G 3521, JIS G 3522,
IS 4454, ASTM A 853-04, ASTM A 227, GOST 9389, GOST 14959
Diameter: 0.2mm-12.5mm
CHEMICAL COMPOSITION (%)
