8 Years
GB3027 Grade 20 Seamless Steel Pipe For Low Temperature Boiler Type: Seamless / SMLS Standard: 1. GB3087 GRADE 20 2. ASTM A 210 Gr. A-1 3. DIN 1629 ST44.0 4. JIS G3461 STB410 5. BS 3059-2 440 6. NF ...
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