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. Standard: GB/T8890 / ASTM B111 / JIS H3300 / BS EN12451 standards
4. Dimensions: Outer diameter:5-350mm,Wall thickness: 0.5-50

. Standard: GB/T8890 / ASTM B111 / JIS H3300 / BS EN12451 standards
4. Dimensions: Outer diameter:5-350mm,Wall thickness: 0.5-50

