钢管管径规格 22-28X2.5-4-6 钢管管径规格 32-38-40X3-4-6-8 钢管管径规格 42-48X3.5-4-5-8-10 钢管管径规格 51-60X3.5-5-6-7-9 钢管管径规格 76-89X4.5-6-8-10-12 钢管管径规格 108-133X5-6-8-10-12 钢管管径规格 159-168X7-8-10-14-18-26 钢管管径规格 194-219X6-8-12-20-26-38 钢管管径规格 245-273X10-12-14-16-22-15-40 钢管管径规格 325-355.6X11-14-16-20-30-40 钢管管径规格 377-426X11-14-16-20-25-40-45 钢管管径规格 426-508X14.2-17.5-22-45-52 钢管管径规格 530-558.8X16.8-60-70
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