guangzhou GB/T14976、GB/T12771、 people ISO、 guangdong DIN、 about A、 people IDF weight: Φ19~Φ3000mm, like mm~50mm, click to enter: TP304、304L、321、316L、316Ti、310S、2205、2507、904L development GB/T4237、GB/T24511; compression
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