We manufacture products strictly accoding to GB/T14975-2002,GB/T14976-2002,GB13296-91,GB12770-91,and ASTM.JIS.DIN standards,and external diameter: 6 to 530mm, wall thickness: 0.8 to 25mm, length: 0.1 to 18m. The products of ZhongLi rangs from...
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