4.1.1热浸镀锌钢管DN20x2.75mm

4.2.11钢塑复合钢管（冷水）DN200

4.2.10钢塑复合钢管（冷水）DN125

4.2.9钢塑复合钢管（冷水）DN125

4.2.8钢塑复合钢管（冷水）DN100